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Know  How 


This  is  not  a  mere  catalog  —  it  is  a  ready 
reference  book  on  the  McAlear  System  of 
Vacuum  and  Vapor  Heating.  It  has  been 
prepared  as  the  result  of  twenty-five  years 
actual  experience  —  it  contains  in  detail  a 
complete  description  of  the  McAlear  System 
and  appliances  —  it  is  an  authoritative  text 
book  on  the  Science  of  Steam  Heating  for 
all  classes  of  buildings. 

This  book  is  dedicated  to  every  one  who 
comes  in  contact  with  heating  problems. 
On  page  3  you  will  find  an  outline  of  the 
unequalled  McAlear  Service  which  we  are 
prepared  to  render  you  free  of  charge  —  also 
our  Ironclad  Guarantee  of  Satisfaction. 

THE  McALEAR  MFG.  CO. 

223  West  Erie  Street 
CHICAGO 


DISTR'CT  sale^.  cafice, 

705  OJRAY  CUlLDIiSIG, 


i 


S; 


MCALEAR  SYSTEM 


The  Result  of  25  Years  of  Experience 


In  presenting  this  Catalog  to  building  owners,  archi¬ 
tects,  engineers  and  steam  heating  contractors,  particular 
attention  is  called  to  the  fact  that  the  McALEAR  SYS¬ 
TEM  is  not  an  experiment — it  is  the  result  of  an  organi¬ 
zation  extending  throughout  the  United  States  and  Can¬ 
ada,  including  a  special  engineering  staff  composed  of 
some  of  the  best  engineers  in  this  country,  who  have  for 
the  past  twenty-five  years  specialized  in  the  science  of 
Vacuum  and  Vapor  heating. 

Our  organization  is  ready  to  prove  to  your  entire 
satisfaction  that  we  have  mastered  the  problems  of  de¬ 
signing,  and  superintending  complete  installations  of 
power  and  heating  equipment  for  any  and  all  classes  of 
buildings. 

Upon  request  we  will  furnish  ^mu  with  a  list  and  de 
scriptioii  of  all  classes  of  buildings  in  which  our  system 
is  being  successfully  operated. 

In  addition,  on  page  3  you  will  find  our  Iron  Clad 
Guarantee  to  replace  Free  of  Charge  any  defective  parts 
of  any  materials  furnished  by  us. 

With  tlie  tenants  of  buildings  constantly  demanding 
better  service — and  the  cost  of  fuel  soaring  upwards — in 
selecting  any  steam  heating  system  the  first  cost  is  not 
the  only  cost  to  be  considered — you  must  take  into  con¬ 
sideration  the  equally  important  questions  of  low  cost  of 
operation,  prevention  of  leaks  and  losses,  minimum  ex¬ 
pense  for  repairs,  maximum  durability,  absolute  noiseless¬ 
ness  as  well  as  safety,  comfort  and  economy — and  this  is 
what  we  claim  and  can  prove  for  the  McAIjEAR 
SYSTEM. 


Me  Alear  Service  Unequalled 

Engineering  Advice — Specific  Information 
Full  Co-operation— FREE 


Under  the  Me  Alear  System  you  are  not  offered  merely  patented 
applianees — you  have  the  right  at  any  time  to  ask  for  and  reeeive 
cheerfully  the  services  of  our  special  Engineering  Department,  eom- 
posed  of  some  of  the  best  engineers  in  this  country- — men  who  for  the 
past  twenty-five  years  have  given  their  entire  time  and  attention  to  the 
solving  of  engineering  problems,  designing  and  superintending  com¬ 
plete  installations  of  power  and  heating  equipment  for  any  and  all 
classes  of  buildings. 

Engineers,  architects,  steam  heating  eontractors  and  building  own¬ 
ers  find  it  saves  time  and  is  profitable  to  use  this  serviee,  why  not  you? 

Our  Engineering  Department  is  thoroughly  competent  to  give  en¬ 
gineering  adviee  and  specific  information  on  all  subjects  pertaining  to 
the  mechanical  equipment  of  buildings  and  this  service  is  combined 
with  quality  and  efficieney,  an  asset,  and  is  free  to  you  for  the  asking. 

Submit  your  problems  to  us  and  we  will  advise  you  the  best  method 
to  work  them  out  for  the  least  expenditure  of  money — always  keeping 
in  mind  the  question  of  efficiency  which  is  being  constantly  strived  for 
by  all  successful  men  and  corporations.  You  are  familiar  with  the  old 
saying,  “A  teaspoonful  of  foresight  is  worth  a  barrel  full  of  hind¬ 
sight,— ASK  US. 

Iron  Clad  Guarantee  of  Satisfaction 

Knowing  from  actual  experience  on  thousands  of  buildings  that 
the  McAlear  System  if  properly  installed  will  give  absolute  satisfaction 
and  that  our  specialties  will  perform  their  respective  functions  in  a  very 
effieient  and  satisfaetory  manner — we  do  not  hesitate  to  make  this  Iron 
Clad  Guarantee. 

We  will  replace  FREE  OF  CHARGE  any  defective  parts  of  any 
material  or  materials  furnished  by  us,  provided  that  such  defective 
material  is  reported  to  us  within  a  reasonable  length  of  time  from  the 
receipt  of  the  goods  or  the  date  of  installation. 

In  addition,  we  also  GUARANTEE  our  Vacuum  Pumps,  Thermo 
Vent  Automatic  Air  Valves  and  Perfeetion  Radiator  Traps  to  be 
ABSOLUTELY  AUTOMATIC  and  NOISELESS  in  operation  and 
to  handle  water  and  air  in  any  quantities  up  to  their  rated  capacities. 

THE  MeALEAR  MANUFACTURING  COMPANY 
223  West  Erie  Street,  Chicago,  U.  S.  A. 


3 


Front  view  of  the  MeAlear  Automatic  \"acuum  Pump. 
(Patented  and  Patents  Pending) 


In  ordering  repair  parts,  refer  to  numbers,  pages  (i  and  7. 

We  do  not  furnish  with  pump  any  of  the  piping  or  fittings  sliown  in  light  lines, 
except  the  vacuum  and  steam  gauges. 


4 


Back  view  of  tlie  McAlear  Automatic  Vacuum  Pump. 


(Patented  and  Patents  Pending) 


In  ordering  repair  parts,  refer  to  numliers,  pages  6  and  7. 

We  do  not  furnish  any  of  the  iu))e  connections  or  fittings  shown  in  light  lines, 
except  the  vacuum  and  steam  gauges. 


5 


Side  view  of  Pump  Head. 


List^of  Parts 

NAME  AND  NUMBER  OF  PARTS. 


1 

Pump  Cylinder 

13 A  Disc  Holder  Nut 

2 

Supporting  Head 

14 

Lower  Diaphragm  Plate,  large 

3 

Nipple 

15 

Lower  j^art  of  Diaphragm  Casting- 

4 

Steam  Valve  Body 

16 

Bolts 

5 

Union  Tail  Piece 

17 

Upper  part  of  Dia2)hragm  Casting 

6 

Union  Nut 

18 

Rubber  Diaphragm 

7 

Union  Coupling- 

19 

Upper  Diaphragm  Plate,  small 

8 

Valve  Bonnet 

20 

Lock  Nut 

9 

Valve  Stem 

21 

UpjJer  part  of  Valve  Stem 

10 

Stem  Head 

22 

Spring  for  Steam  Valve 

11 

Disc  Holder  Ring 

23 

Brass  Cap 

12 

Disc  Holder 

24 

Spring  Holder 

13 

Composition  Disc 

25 

Adjustment  Nut 

7 


VACUUM  (y  ♦ 


26  Union  Elbow 
37  Union  Nut 

28  Union  Tailpiece 

29  Nipple 

30  Nipple 

31  Elbow 

32  Nipple 

33  Tee 

34  Nipple 

35  Nipjjle 

30  Union  Tail  Piece 

37  Union  Nut 

38  Union  Ell 

39  Pilot  Valve  Disc 

40  Pilot  Valve  Spring 

41  Cap  for  Pilot  Valve 

42  Pilot  Valve  Body 

43  Pilot  Valve  Bonnet 

44  Pilot  Valve  Bracket 

45  Ni])ple 

46  Elbow 

47  Union  Nut 

48  Union  Tail  Piece 

49  Nipple 

50  Cap  Elange  over  Si)ray  Pipe  Open¬ 

ing 

51  Spray  Plug 

52  Spray  Tube 

53  Spray  Plate  Stem 

54  Spray  Nozzle 

55  I.ock  Nut 

56  Spray  Plate 

57  Cap  Screws 

58  Brass  Cap 

59  S])ring  for  Water  Valve 

60  Upper  part  of  Diaphragm  Casting 

61  I.ock  Nut 

62  Upper  Diai)hragni  Plate,  large 

63  Up])er  part  of  Diaphragm  Casting 

64  Rubber  Diaphragm 

65  Bolt 

66  Lower  part  of  Diaphragm  Casting 

67  I>ower  Diaphragm  Plate,  small 

68  Stuffing  Box 

69  Stuffing  Box  Nut 

70  Union  Nut  for  Water  Valve 

71  Valve  Stem  for  Water  Valve 

72  Valve  Bonnet  for  Water  Valve 

73  Stem  Head 

74  Disc  Holder  Ring 

75  Composition  Disc 


76  Disc  Screw 

77  Water  Valve  Body 

78  Nipple 

79  Strainer  Tee 

80  Strainer  Plug 

81  Strainer  Basket 

82  I>ock  Nut  for  Pilot  Valve  Bonnet 

83  Stuffing  Box  for  Pilot  Valve  Bonnet 

84  \'alve  Stem  for  Pilot  Valve 

85  Lock  Nuts  for  Pilot  Valve  Stem 

86  Adjustable  Piston  Plate 

87  Key  for  Operating  Water  ^’alve 

88  Lock  Shield  Stuffing  Box 

89  ^^alve  Bonnet 

90  Needle  Valve  Body 

91  Needle  Valve  Stem 

92  Nipple 

93  Nijiple 

94  Sj)ray  Pipe  for  Tliermostatic  Disc 

95  Separating  Spiders 

96  Thermostatic  Discs 

97  Nipple 

98  Flange  for  Water  Seal  Trap  con¬ 

nections 

99  Nipple 

100  Pipe  Connection  to  Water  Seal 

101  Air  Check  Valve  Body 

102  Air  Check  Valve  Cap 

103  Air  Check  Valve  Disc 

104  Air  Check  Valve  Hinge 
104A  Air  Check  Valve  Hinge  Nut 

105  Air  Check  Valve  Union  Nut 

106  Air  Clieck  Vah^e  Tail  Piece 

107  Nipple 

108  Nipple 

109  Nipple 

110  Elbow 

111  Nipple 

112  Discharge  Cheek  Valve  Body 

113  Discharge  Check  Valve  Disc 

114  Discharge  Check  Valve  Hinge 
114A  Discharge  Check  Valve  Hinge  Nut 

115  Discharge  Check  Valve  Union  Nut 

116  Discharge  Check  Valve  Tail  Piece 

117  Discharge  Check  Valve  Cap 

118  Water  Seal  Trap 

119  Supporting  Leg 

120  Supporting  Band 

121  Discharge  Pipe 

122  Drain 


8 


i 

I 


9 


VACUUM  vapor>heat 

Operation  of  the  McAlear  Automatic  Vacuum 
Pump  and  its  Advantages 

So  that  you  will  understand  how  simple  and  easy  is  the  operation  of 
The  McAlear  Automatic  Vacuum  Pump  and  why  it  cannot  fail  to  live  up 
to  the  claims  we  make  for  it^  here  is  a  brief  outline  of  the  facts. 

The  Pump  consists  of  a  large  eylinder  which  stands  vertically  on  a 
substantial  base.  On  top  of  the  cylinder  is  mounted  the  Automatie  Valve 
mechanism  to  which  all  air,  steam  and  water  eonnections  are  made. 

The  air  connections  consist  of  the  vacuum  air  lines,  whieh  conneet  with  all 
of  the  air  valves  on  the  radiators  throughout  the  building  or  plant,  as  here¬ 
after  outlined  and  described  in  the  specifications.  Pages  33  to  35  inclusive. 

The  steam  for  operating  the  pump  is  taken  from  low-pressure  heating 
main  or  from  boiler  direet  (if  operated  low-pressure),  and  connected  to  the 
steam  valve,  which  is  made  a  part  of  the  Automatie  Valve  mechanism  referred 
to  above. 

The  water  for  condensing  purposes  is  taken  from  the  city  water  pressure 
and  connected  to  the  Water  Valve,  which  is  also  made  a  part  of  the  Auto¬ 
matic  Valve  mechanism.  One  of  the  McAlear  advantages  lies  in  the  fact 
that  all  of  these  connections  are  controlled  and  operated  by  means  of  the 
Automatie  Valve  mechanism  and  Thermostatic  motor,  mounted  on  top  of 
cylinder,  as  outlined  above. 

The  Operation.  When  the  Pump  is  in  operation,  steam  enters  the 
cylinder  through  steam  valve  and  forees  the  air  contained  therein  out  through 
the  discharge  pipe  at  the  bottom  into  the  water  seal  trap.  After  the  air  is 
completely  discharged  from  the  cylinder,  a  small  amount  of  steam  passes 
from  the  cylinder  into  the  water  seal  trap  and  from  this  point  it  is  carried 
up  through  a  pipe  to  the  Thermostatic  Motor  chamber  causing  the  Thermo- 
statie  disc  to  expand  and  open  a  valve  which  permits  the  city  water  pres¬ 
sure  to  be  exerted  on  the  diaphragms  of  the  steam  and  water  valve  simul¬ 
taneously  closing  the  steam  and  opening  the  water  valve,  thereby  admitting 
water  to  the  cylinder  in  the  form  of  a  SPRAY,  condensing  the  steam  or 
vapor  contained  therein,  produeing  a  vacuum — a  very  simple,  economical 
and  positive  method. 

Enormous  Reserve  Power.  Thus,  you  see,  an  exceptionally  high 
vacuum  is  produced  almost  instantly — and  any  experienced  engineer  will 
tell  you  that  there  is  no  greater  or  MORE  POSITIVE  method  of  producing 
a  vacuum  than  by  the  condensation  of  steam  when  it  is  enclosed  in  an  air 
tight  cylinder  such  as  we  use  in  the  manufacture  of  our  pumps.  Taking 
these  facts  into  consideration,  also  the  eapacity  of  our  different  sizes  of 
pumps,  you  will  readily  see  that  we  have  an  enormous  RESERVE  POWER 
on  hand  to  meet  any  and  all  emergencies. 

Simple  and  Effective.  While  the  water  is  entering  the  eylinder  in  the 
form  of  a  spray,  it  is  also  admitted  to  the  thermostatie  motor  for  the  pur¬ 
pose  of  cooling  and  reducing  the  pressure  therein.  When  this  is  accom¬ 
plished,  the  spring  above  the  valve  disc  will  automatically  close  the  water 
valve. 


10 


H  EAT  I  N  G-  *7y\5,/S^LEKRI  ■>  ^PECIALTl  E5 


The  vacuum  produced  by  the  pump  is  sufficient  at  this  point  to  hold  the 
steam  v^alve  closed  by  its  passing  from  the  Pump  Cylinder  through  small 
port  holes  in  the  Steam  Valve  bonnet  to  under  side  of  diaphragm,  holding  it 
in  a  locked  position  with  the  steam  and  water  valves  closed. 

The  valves  will  remain  closed  until  the  vacuum  in  the  cylinder  drops 
to  four  or  five  inches,  at  which  point  the  spring  over  steam  valve  diaphragm 
will  release  the  valve  and  allow  it  to  open,  thereby  permitting  the  steam  to 
again  enter  the  cylinder  and  drive  the  air  pulled  from  the  system  by  the 
])revious  stroke,  out  through  the  discharge  at  the  bottom.  After  the  air  is 
all  discharged,  steam  will  again  enter  the  thermostatic  motor,  closing  the 
steam  valve  and  opening  the  water  valve,  allowing  the  pump  to  complete 
another  stroke,  as  hereinbefore  outlined. 

The  Power  Plant.  The  Thermostatic  Motor  is  the  power  plant  of  the 
])ump — it  gets  its  thermostatic  action  from  the  volatilization  of  a  liquid  con¬ 
fined  in  a  number  of  metal  discs  with  flexible  walls. 

The  laws  governing  the  volatilization  of  liquids  are  immutable  and  discs 
of  this  construction  can  always  be  relied  upon  to  do  the  same  work  when 
operated  under  the  same  temperatures.  The  power  produced  by  the  discs 
is  always  in  direct  proportion  to  the  temperatures  to  which  they  are  sub¬ 
jected.  This  power  is  directed  in  such  a  manner  as  to  make  the  upward 
and  downward  strokes  of  the  pump  POSITIVE  and  QUICK.  Every  move¬ 
ment  is  absolutely  controlled  by  the  Thermostatic  Motor,  insuring  a  positive 
action  which  is  absolutely  automatic  and  reliable  in  every  way. 

One  of  the  big  advantages  of  the  Thermostatic  Motor  is  that  it  is  actu¬ 
ated  by  temperatures — the  hot  vapor  or  steam  is  brought  in  contact  with  th(‘ 
motor,  thereby  creating  sufficient  pressure  and  power  to  invariably  open  tlu* 
Pilot  Water  Valve,  closing  the  steam  valve  and  opening  the  water  valve 
simultaneously,  permitting  the  water  to  enter  the  cylinder  and  thermostatic 
motor  at  one  and  the  same  time,  thus  causing  the  condensing  of  the  steam 
in  the  cylinder  and  the  cooling  of  the  thermostatic  motor,  thereby  reducing 
the  pressure  and  allowing  the  springs  to  close  the  valves. 

Steam  Power.  The  minimum  steam  pressure  required  to  operate  the 
})ump  is  from  one-quarter  to  one-half  pound  above  the  atmosphere.  This 
])ressure  is  only  necessary  when  the  pump  is  discharging.  After  the  pump 
lias  produced  a  vacuum  of  twelve  to  fifteen  inches  and  the  piping  system  is 
reasonably  tight,  it  may  be  some  time  before  the  pump  will  be  called  upon 
to  make  another  stroke. 

During  this  time,  the  entire  heating  system,  including  the  boilers  (if 
the  plant  is  operated  low-pressure),  can  be  run  under  a  vacuum.  The  only 
time  that  steam  pressure  is  necessary  is  when  the  pump  is  discharging  and 
then  a  slight  pressure  above  the  atmosphere  is  all  that  is  required. 

The  Pump  will  operate  on  any  pressure  from  one-half  pound  to  a  maxi¬ 
mum  of  ten  pounds. 

Water  Pressure.  The  water  pressure  required  for  the  pump  varies  from 
a  minimum  of  ten  pounds  to  a  maximum  of  fifty  pounds.  If  the  city  water 
pressure  exceeds  fifty  pounds,  there  should  be  placed  in  the  water  supply 
to  the  pump,  a  pressure  reducing  valve  to  reduce  the  pressure  to  below  fifty 
pounds. 


11 


VACUUM  6^  ♦  Ml vapor  heat 

A  very  important  characteristic  of  the  McALEAR  Automatic  Vacuum 
Pump  not  to  be  found  in  any  otlier  apparatus  used  for  tlie  same  purpose  is 
the  fact  that  tlie  pum})  continues  to  ])erform  its  work  after  the  thermostatic 
motor  has  closed  tlie  steam  and  water  valves.  This  is  accomplished  by  the 
large  cooling  surfaces  of  the  cylinder,  which  continues  to  condense  any  vapor 
or  steam  that  may  remain  therein,  tlierehy  increasing  the  vacuum  and  remov¬ 
ing  the  air  from  the  system  long  after  the  ]mmp  is  apjiarently  out  of  service. 

Another  characteristic  of  the  ^leALEAR  Pump  is  the  powerful  impulse 
or  ])ull  that  each  stroke  has.  This  is  so  noticeable  that  in  starting  the  plant 
in  the  morning,  only  a  few  strokes  of  the  pump  are  necessary  to  entirely  ex¬ 
haust  all  the  air  from  the  heating  system  and  to  circulate  steam  through  the 
farthest  radiators  and  most  remote  parts  of  the  plant  as  quickly  as  those 
nearest  the  pump  and  boiler.  This  is  due,  however,  to  the  enormous  capacity 
and  displacement  of  the  McALEAR  Pumps.  These  pumps  perform  their 
work  on  large  plants  equally  as  well  as  on  small,  as  the  efficiency  increases 
in  proportion  as  the  speed  of  operation  decreases.  This  is  accounted  for  by 
the  exposed  condensing  surfaces  of  the  cylinders,  which  can  be  readily  dem¬ 
onstrated  by  closing  the  valve  in  the  air-line  connection  at  the  pump,  allowing 
it  to  make  a  stroke.  When  the  stroke  is  completed,  you  will  find  that  the 
pump  has  produced  a  vacuum  of  fifteen  to  eighteen  inches  and  that  this 
vacuum  will  continue  to  increase  for  a  period  of  fifteen  to  twenty  minutes 
after  the  steam  and  water  valves  are  closed  and  the  pump  is  apparently  out 
of  service. 

It  would  be  impossible  to  accomplish  this  with  any  other  make  of  pump, 
as  the  vacuum  produced  woidd  almost  immediately  disappear  if  the  pump 
was  shut  down  for  a  period  of  five  or  ten  minutes.  Thus,  you  will  see  why 
we  claim  such  high  efficiencies  and  low  cost  of  operation.  There  is  no  other 
pump  manufactured  that  has  the  capacity  for  handling  and  exhausting  air 
in  large  volumes  from  a  heating  system  as  the  McALEAR  Pump.  It  is 
absolutely  automatic,  starting  and  stopping  when  needed  and  performing 
its  work  without  tlie  aid  of  outside  power.  It  is  the  only  pump  in  existence 
that  has  for  its  power  plant  a  thermostatic  motor  actuated  by  the  tempera¬ 
ture  of  steam  and  water. 

The  McALEAR  Automatic  Vacuum  Pump  is  positive  and  quick  in 
action,  simple  and  economical,  and  when  in  operation,  does  its  work  with 
eighty  per  cent  less  power  than  any  other  pump  handling  the  same  amount 
of  air  and  doing  the  same  work.  It  is  adaptable  to  all  kinds  of  steam- 
heating  plants  whether  they  be  office  buildings,  public  buildinggs,  industrial 
plants  or  small  residences.  If  ^^ai’ties  interested  will  only  investigate  the 
different  vacuum  systems  of  heating  now  in  use,  they  will  be  fairly  con¬ 
vinced  that  we  have  the  simplest  and  most  effective  vacuum-producing  ap- 
jiaratus  manufactured  for  the  automatic  removal  of  the  air  and  water  from 
a  heating  system. 


12 


H  E  A  T  I  N  G-  «  7V\  C  ^  LEAR  ♦■SPECIALTIES 


McAlear  System 

The  Biggest  Forward  Step  in  the  Science  of 

Steam  Heating 

There  was  a  day  when  a  heating  system  siin})ly  consisted  of  a  boiler, 
])ipes  and  radiators — but  that  day  is  gone  forever. 

So  important  is  the  problem  of  heating  homes,  stores,  factories,  and 
))ublic  buildings,  tliat  it  has  attracted  to  it  the  best  eng-ineering  and  mechan¬ 
ical  brains  possible  to  obtain.  Thousands  upon  thousands  of  dollars  and 
years  of  labor  have  been  devoted  to  solve  this  most  important  problem,  and 
as  a  result  wonderful  progress  has  been  made. 

The  old  method  of  selecting  a  steam  heating  S3\stem  entireh’  on  the 
initial  cost  basis,  regardless  of  the  cost  of  operation  afterwards,  has  proved 
so  expensive  and  so  unsatisfactorv  in  the  results  obtained  that  today  although 
the  cost  of  apparatus  for  the  use  of  steam  heat  is  greater,  the  econom\"  in 
its  use  more  than  justifies  the  increased  initial  expense. 

We  will  all  agree  that  the  hot  water  was  a  marked  improvement  over 
any  previous  sj^stem,  but  since  the  systems  of  vacuum  and  vapor  heating 
have  been  perfected  as  demonstrated  in  the  McAlear  Sj^stem,  the  hot  water 
method  of  heating  is  rapidU^  becoming  a  thing  of  the  past. 


Vacuum  Heating  the  Perfect  System 

Since  the  introduction  of  the  Vacuum  and  Vapor  Systems  of  lieating. 
and  their  general  adoption  by  the  engineering  profession,  it  has  proved 
to  be  the  best  for  residences,  office  buildings,  churches,  and  industrial  plants 
which  in  former  years  were  equipped  with  either  hot  water  or  steam  pres¬ 
sure  systems.  The  fact  that  eigliW-five  per  cent  of  such  buildings  are  now 
being  equipped  with  Vacuum  or  vapor  systems  proves  bevond  a  shadow  of 
a  doubt  that  this  method  of  heating  is  fundamentally  correct  and  has  come 
to  stay. 

All  noted  authorities  on  the  science  of  heating  agree  that  steam  in¬ 
herently  affords  the  best,  the  most  satisfactory^  the  most  elastic  and  depend¬ 
able  and  the  most  economical  method  of  heating.  Here  are  some  facts  in 
regard  to  the  advantages  of  steam  that  are  indisputable. 


13 


I 


VACUUM  6-  VAPOR  HEAT 


The  temperature  at  which  steam  is  given  off  from  boiling  water  varies 
in  accordance  with  the  boiling  point  of  the  water  itself.  This  boiling  point 
varies  in  accordance  with  the  pressure  on  its  surface.  In  an  open  vessel, 
and  at  sea  level,  water  will  boil  at  212°  Fahrenheit.  Under  these  conditions, 
the  pressure  on  the  surface  of  the  water  is  the  weight  of  a  column  of  air 
one  square  inch  in  section,  or  actually  1 1.7  pounds  above  absolute  vacuum. 
An  increase  in  the  pressure  on  the  surface  of  the  water  raises  the  temperature 
of  the  boiling  point,  while  a  decrease  in  the  pressure  lowers  the  temperature. 
The  following  table  illustrates  how  these  variations  take  place. 


Pressure 

(1) 

Boiling  Temp. 
Degrees  Fahr. 

(2) 

Total  Heat 
above  32°  Fahr. 

B.  t.  u. 

(3) 

Heat  Given 
off  in  Condensing 

B.  t.  II. 

(4) 

Relative  Volume 
of  Water 
at  39.1°—! 

(5) 

N'aciuim  in  Mercury 
16" 

175.8 

1135.8 

992.0 

3380 

15" 

178.8 

1137.0 

990.2 

3163 

14" 

181.8 

1138.2 

988.4 

2982 

13" 

184.5 

.  1139.4 

986.8 

2821  ■ 

12" 

187.2 

1140.5 

985.2 

2677 

11" 

189.8 

1141.4 

983.6 

2547 

10" 

192.2 

1142.3 

982.0 

2429 

9" 

'  194.5 

1143.2 

980.6 

2321 

8" 

196.8 

1144.1 

979.2 

2222 

7" 

198.9 

1145.4 

977.9 

2131 

6" 

200.9 

1145.8 

976.6 

2047 

5" 

202.9 

1146.6 

975.4 

1967 

4" 

204.9 

1147.2 

974.2 

1897 

3" 

206.7 

1147.9 

973.1 

1820 

2" 

208.5 

1148.6 

971.9 

1758 

1" 

210.3 

1149.3 

970.7 

1700 

Atmosphere 

212.0 

1150.0 

968.7 

1646 

1  lb. 

215.3 

1151.2 

967.6 

1548 

2  lbs. 

218.5 

1152.4 

965.6 

1460 

3  lbs. 

221.5 

1153.6 

963.6 

1382 

4  lbs. 

224.4 

1154.6 

961.8 

1312 

5  lbs. 

227.1 

1155.5 

960.0 

1249 

6  ll)s. 

229.8 

1156.5 

958.2 

1192 

7  lbs. 

232.3 

1157.4 

956.6 

1141 

8  lbs. 

234.8 

1158.3 

954.9 

1084 

9  lbs. 

237.1 

1159.0 

953.3 

1051 

10  lbs. 

239.4 

1159.8 

951.8 

1050 

) 


HEATING- 


♦  SPECIALTIES 


It  will  readily  be  seen  by  a  study  of  columns  two  (2)  and  three  (3) 
that  water  under  a  vacuum  of  nine  inches  will  boil  at  and  that  the 

steam  generated  therefrom  contains  a  total  of  1143.2  units  of  heat.  Column 
four  (4)  shows  the  number  of  units  of  heat  given  off  by  the  steam  when 
condensed,  the  water  having  a  temperature  equivalent  to  the  boiling  point. 
It  will  he  further  noted  from  table  that,  with  a  10-pound  pressure  above 
atmosphere,  water  will  require  239.4°  before  it  will  boil. 

This  table  demonstrates  very  plainly  that  steam  can  be  generated  (in  a 
vacuum)  below  212°,  the  usual  boiling  point;  and  with  a  McALEAR  System 
this  low-pressure  steam  can  he  circulated  throughout  the  entire  heating  jolant 
by  means  of  the  JNIcALEAR  Automatic  Vacuum  Pump,  which  produces  a 
vacuum  on  the  boilers  and  radiators  as  well  as  the  air-line,  and  entire  system 
of  supply  and  return  mains. 

Therefore,  it  is  readily  seen  why  vacuum  heating  systems  are  supplanting 
hot-water,  as  steam  when  used  in  connection  with  the  McALEAR  System 
can  be  circulated  at  about  the  same  temperature  as  hot  w^ater,  giving  the 
advantage  of  quick  heating  and  cooling  for  the  mild  weather  in  spring  and 
fall,  which  points  are  decidedly  in  favor  of  steam  and  the  McALEAR 
System. 

Properties  of  Saturated  Steam 


Pressure 
or  Vacuum 

Pounds 
per  sq.  in. 

Tempera¬ 

ture 

Heat  of 
the  liquid 

— 12 

137 

105 

— 10 

160 

128 

— 8 

175 

143 

— 6 

187 

155 

*  —4 

197 

165 

— 2 

205 

173 

0 

212 

180.9 

1 

215 

184 

2 

219 

188 

3 

222 

191 

4 

224 

193 

5 

227 

196 

10 

239 

208 

15 

249 

218.8 

20 

258.7 

228 

25 

266.7 

236.2 

30 

273.9 

243.5 

35 

280.5 

250.2 

40 

286.5 

256.3 

45 

292.2 

262.1 

50 

297.5 

267.5 

55 

302.4 

272.6 

60 

307.1 

277.2 

65 

311.5 

281.8 

70 

315.8 

286.1 

75 

319.8 

290.3 

80 

323.7 

294.3 

85 

327.4 

298.1 

90 

330.9 

301.8 

95 

334.4 

305.4 

100 

337.6 

308.9 

110 

343.9 

315.4 

120 

349.8 

321.5 

130 

355 

327.5 

140 

360 

333.5 

150 

365.7 

338.3 

Latent 

Heat 

Total  Heat 

Volume  of 
lb.  of  stea 
cubic  feet 

1019 

1124 

135 

1003 

1131 

78.3 

992 

1135 

55.9 

984 

1139 

43.6 

977 

1142 

35.8 

971 

1144 

30.6 

965.7 

1146.6 

23.30 

964 

1148 

25 

961 

1149 

23 

959 

1150 

22.3 

957 

1150.5 

21.2 

955 

1151 

20.16 

946 

1154 

16.3 

939.3 

1158.1 

13.7 

932.5 

1161 

11.85 

927.1 

1163.3 

10.36 

922 

1165.5 

9.34 

917.3 

1167.5 

8.45 

913 

1169.3 

7.73 

909 

1171.1 

7.11 

905.2 

1172.7 

6.61 

901.6 

1174.2 

6.16 

898.4 

1175.6 

5.77 

895.1 

1176.9 

5.43 

892.1 

1178.2 

5.13 

889.1 

1179.4 

4.86 

886.3 

1180.6 

4.63 

883.6 

1181.7 

4.41 

881 

1182.8 

4.20 

878.5 

1183.9 

4.02 

876 

1184.9 

3.83 

871.4 

1186.8 

3.57 

867.1 

1188.6 

3.33 

863 

1190.3 

3.1 

859.1 

1191.9 

2.92 

855.4 

1193.4 

2.75 

15 


Method  of  installing  the  MeAlear  Air  Line  System  of  Vacuum  Heating 
where  water  of  condensation  is  returned  to  the  boiler  direct. 


16 


H  EAT  I  N  O'  ♦  MC  SLE^RU  .SPECIALTl  E5 


Why  the  McAlear  System  is  Superior 
to  All  Others 

In  stating  that  the  McAlear  System  is  superior  to  all  others^  we  are 
making  a  j)rcttv  strong  claim — hut  we  are  ready  to  })rove  to  the  satisfaction 
of  any  building  owner,  heating  engineer,  heating  contractor  or  architect 
onr  claim  not  only  in  theory  but  in  actual  service. 

First  of  all  the  simplicity  of  construction,  installation  and  operation 
will  appeal  to  yon.  We  use  the  term  “S_vstem”  to  designate  the  combined 
aj^plication  of  the  INIcAlear  Automatic  Vacnnm  Pump,  together  with  all  the 
connections  that  go  with  it.  also  the  McAlear  Tliermo  Vent  Automatic  Air 
Valves,  which  com})rise  a  comi)lete  method  and  system  of  steam  circnlation. 

M'ith  the  McAlear  System  vacuum  can  be  maintained  on  the  pump  and 
air  lines  including  the  radiators  and  boiler,  if  operated  at  low  pre.ssure. 
This  is  accom])lished  by  means  of  the  McAlear  Automatic  Vacuum  Pump, 
which  when  properly  placed  and  connected,  REQUIRES  NO  ATTENTION 
ON  THE  PART  OF  ANY  ONE  to  keep  it  in  successful  operation — a 
distinct  and  exclusive  McAlear  advantage.  While  the  McAlear  System  lias 
many  other  advantages,  on  this  one  point  alone  we  base  our  claim  and  can 
prove  by  actual  operation  that  it  is  SUPERIOR  TO  AIT.  OTHERS — 
because  all  other  systems  produce  and  maintain  a  vacuum  at  one  point  only 
by  means  of  comjilicated  and  sometimes  expensive  pumps  and  apjiaratus 
which  required  skilled  attention. 

Any  practical  heating  engineer,  by  a  careful  study  of  the  ^McAlear  in¬ 
stallation,  will  find  that  a  perfect  circulation,  control  and  distribution  of 
steam  can  be  obtained  in  a  MUCH  GREATER  DEGREE  than  is  possible 
with  any  other  system.  For  this  one  reason  alone  many  heating  Engineers 
and  Architeets  wlio  have  made  a  careful  study  of  the  heating  problem  do 
not  hesitate  to  give  the  IMcAlear  System  their  endorsement  and  preference. 

Perfect  Heat  Without  Noise,  Leakage, 

Damage  or  Waste 

The  McAlear  System  is  jireferred  for  office  buildings,  hotels,  schools, 
])ublic  buildings  of  various  types,  and  hospitals  where  absolute  quietness  is 
necessary.  There  is  no  clicking,  rattling,  ])ounding,  distracting  noises  in  the 
radiators — there  is  no  sizzling  and  leaky  valves — no  escaping  of  foul  air 
from  the  radiators — no  escaping  steam  or  w'ater  to  destroy  rugs,  carpets, 
furnishings  or  decorations. 

Iiij  considering  the  McAlear  System  your  particular  attention  is  called 
to  the  fact  that  it  wmrks  perfectlj^  either  with  or  without  temperature  regula¬ 
tion,  or  on  a  one  or  two  pipe  system,  making  it  adaptable  and  suitable  for 
all  classes  of  buildings  and  plant.s — especially  apartment  buildings  and  resi¬ 
dences,  where  warm  rooms  and  halls  are  necessary  to  satisfy  the  tenants. 

Due  to  the  extreme  sinqdicity  of  construction,  the  McAlear  System  is 
elastie  in  ap])lication.  Tlie  proportioning  of  pumps  for  a  large  range  of 
radiation  surface  is  merely  a  question  of  using  different  sizes  of  ])umps  of 
suitable  capaeity  for  the  services  required. 


17 


VACUUM  <y  heat 


18 


Method  of  making  McAlear  Air  Line  System  connections  to  coils  and  radiators. 


HEATlNGh  ♦7V\C^LE^R*’SPECIALT1E5 


Many  of  the  McAlear  Systems  are  being  installed  by  those  wlio  have 
bad  experience  with  hot  water  and  other  vacnum  systems — especially  by 
those  who  have  learned  tbrongli  costly  experience  that  QUALITY  rather 
than  PRICE  should  determine  the  selection  of  a  proper  heating  system. 
They  have  learned  from  experience,  too,  that  quality  determines  the  prac¬ 
ticability,  the  very  operation  and  life  of  the  apparatus,  the  cost  of  its  up- 
keej) — because  the  money  invested  in  quality  pays  tlie  richest  dividends  in 
the  end. 

Notwithstanding  the  fact  that  the  INIcAlear  System  is  simplified  and 
standardized,  its  extreme  simplicity  and  sensitiveness  is  as  efficient  and  dur¬ 
able  as  the  heating  system  itself. 

All  Back-Pressure  Absolutely  Eliminated 

Here  is  just  one  of  many  reasons  why  you  should  give  our  system  the 
preference.  When  applied  to  plants  using  exhaust  steam  for  heating  pur¬ 
poses,  it  enables  such  plants  to  circulate  exhaust  or  live  steam  at  a  pres¬ 
sure  less  than  that  of  the  atmosphere  (by  removing  all  back  pressures  from 
engines,  pumjis,  etc.),  and  by  so  doing  it  lowers  the  cost  of  operation  and 
increases  the  efficiency  and  power  of  the  engines  and  pump. 

For  many  years,  owners  of  power  plants  labored  under  the  delusion 
that  exhaust  steam  could  not  be  utilized  for  heating  pur2:)oses  without  having 
to  carry  excess  back  pressure  on  engines  to  force  its  circulation.  It  is  only 
in  recent  years  that  its  use  in  connection  with  heating  was  given  any  con¬ 
sideration.  Today  there  is  scarcely  a  power  plant  operated  in  connection 
with  the  heating  of  buildings  that  does  not  utilize  all  of  its  exhaust  steam 
for  heating  purposes. 

]\Iany  of  the  more  modern  plants,  however,  are  equipped  with  a  vacuum 
system  which  enables  them  to  use  the  exhaust  steam  without  having  to  carry 
any  excessive  back  pressure  on  the  engines,  because,  for  instance,  the 
vacuum  produced  by  the  McAlear  System  for  the  purpose  of  automatically 
removing  the  air  and  water  is  sufficient  to  cause  the  steam  to  flow  to  all 
points  of  use  without  pressure,  thus  increasing  the  efficiency  of  the  engines 
and  heating  system,  also  enabling  the  development  of  more  power  with 
less  coal  than  is  possible  to  obtain  where  plants  are  not  so  equipped. 

Especially  Adapted  for  Buildings  Using  Steam 
from  a  Central  Plant 

The  installation  of  the  McAlear  Automatic  Vacuum  Pump  in  buildings 
receiving  their  heat  from  a  central  plant  insures  a  perfect  circulation  of 
steam  throughout  all  radiators,  regardless  of  what  the  pressure  may  be  on 
the  street  mains.  In  proof  of  this,  there  are  a  number  of  central  plants 
tliroughout  the  countr}'^  using  this  system  in  connection  with  buildings  re¬ 
ceiving  their  steam  from  a  central  station — in  each  instance  the  system  is 
giving  perfect  satisfaction  and  the  owmers  and  operators  speak  in  the  high¬ 
est  terms  of  the  results  obtained. 


19 


SUPPLY 


VAC  U  U  M  BLEIM  ♦  VAPOR  -.H  EAT 


20 


Method  of  making  McAlear  Air  Line  Connections  to  fan  ])ipe  coils, 
^^ento  radiation  and  Indirect  cast-iron  radiatit)n. 


HEATING-  ♦7V\S>5^LEMR* -SPECIALTIES 

Capacities  and  Prices  of  the  McAlear  Vacuum  Pumps 


Number 
of  rumii 

Maximum  (buiaeity 
ill  .Sij.  Ft.  <if  Direct 
Uaiiiation 

Air  Displacemeut 
of  Pump  in  Cu.  lii. 
l*er  Stroke  From 
No.  Vacuum  to 

27  In. 

Ciaitcnts  of 
Pumi)  C.viinilcrs  In 
Cubic  Feet 

steam  Oou- 
.‘<um|)tiou  of  I’umiis 
in  Poumls  I’er 
Stroke 

PRICES 

1 

1000 

0939 

4.4 

.1072 

.$  200 

2 

1800 

9099 

.5.3 

.2014 

25.5 

3 

3000 

9342 

0.0 

.2280 

^8,5 

4 

4400 

13932 

8.8 

.3344 

320 

5 

(iOOO 

1,5.5.52 

9.9 

.3702 

375 

6 

7800 

17172 

11.0 

.4180 

440 

7 

!)800 

18792 

12.0 

.4500 

,505 

8 

12:200 

20800 

10.4 

.0232 

585 

9 

15200 

2.5,515 

18.0 

.0840 

075 

10 

19500 

31239 

20.1 

.7038 

775 

11 

24500 

33151) 

21.3 

.8094 

880 

12 

30000 

3,5094 

22.9 

.8702 

1000 

Water  consumption  of  ]nnnj)s  varies  from  5  to  8  pounds  i)er  stroke,  dej^ending 
on  size  and  amount  of  vaenmn  produced. 

XO'l'E — Important. 

In  determining  tlie  jiroj^er  size  pump  for  the  work  please  read  the  three  para- 
graj)lis  liereinafter  outlined  under  heading  “Basis  for  Determining  the  Proper  Size 
Pninj)  for  the  Work.” 

We  w’ill  guarantee  the  satisfactory  o})eration  of  our  pumps  only  when  connected 
with  the  radiation  e(jual  to  or  less  than  the  maximum  rated  capacities  given  in  the 
above  table. 

Basis  for  Determining  the  Proper  Size  Pump  For  the  Work 

If  fan  coils  and  direct  radiation  are  used  for  heating  and  ventilating  and  the 
fan  coil  surface  is  given  in  lineal  feet  of  one-inch  pijie,  reduce  it  to  square  feet  and 
multiply  by  two,  then  add  the  direct  radiation  if  there  he  any  and  the  total  will 
enable  you  to  determine  on  the  proper  size  ])ump. 

If  the  fan  coil  surface  is  given  in  square  feet  of  vento  radiation,  multiply  by 
two  and  add  the  square  feet  of  direct  radiation,  if  there  he  any  and  the  total  will 
enable  you  to  determine  on  the  proper  size  pumj). 

If  these  are  no  fan  coils,  then  take  the  square  feet  of  direct  radiation.  If  there 
is  no  direct  radiations  take  the  fan  coils  or  vento  on  the  basis  hereinbefore  outlined. 

Shipping  Weight,  Overall  Dimensions  and  Size  of  Pipe 
Connections  for  the  McAlear  Vacuum  Pumps 


->0.  of 

Pump 

Weigiit 

Height 

tviatii 

Steam 

Water 

Vapor 

Discharge 

Air  Line 

I 

280 

5'3" 

2'0" 

ly^ 

4 

14 

2" 

1" 

2 

320 

5'5" 

9'-2" 

iy4 

4 

14 

2" 

1" 

3 

350 

5 '9" 

0^-2" 

lyp 

4 

14 

2" 

1" 

4 

420 

5'9" 

2'0" 

D4 

4 

14 

2" 

1" 

,5 

400 

O'l" 

2'0" 

1*4 

4 

14 

3" 

1" 

0 

520 

2'0" 

14 

4 

14 

3" 

1" 

7 

550 

0'8" 

2'0" 

14 

4 

14 

2" 

1" 

8 

000 

0'3" 

3'0" 

14 

4 

14 

2" 

1" 

9 

040 

0'7" 

3'0" 

14 

4 

14 

O" 

1" 

10 

070 

O'll" 

3'0" 

14 

4 

14 

3" 

1" 

11 

090 

8'2" 

3'0" 

14 

4 

14 

2" 

1" 

12 

770 

7'8" 

3'0" 

14 

4 

14 

3" 

1" 

21 


VACUUM  6-  ♦MIZ^\L£RR]^  vapor  heat 


McAlear  Electric  Air  Line  Vacuum  Pump 


Protected  by  Patents 

Exclusive  Advantages 

An  important  part  of  our  system  is  the  McAlear  Electric  Air  Line  Vacu¬ 
um  Pump  of  an  entirely  new  and  improved  type  of  rotary  design — with  a 
single  propeller  which  rotates  on  ball  bearings  displacing  the  air  with  a  roll¬ 
ing  motion^  eliminating  all  friction  and  rubbing  surfaces.  When  in  opera¬ 
tion  neither  air  or  water  is  required  to  seal  these  pumps — there  are  no 
valves,  gears,  pistons,  or  sliding  contacts  requiring  take-up  or  adjustment. 

These  improved  pumps  will  take  care  of  aiw  water  that  may  be  carried 
back  in  the  air  lines — without  injury  to  any  of  their  parts  and  without 
impairing  their  economy  and  efficiency  in  any  way. 

The  pump  motor  and  idler  come  mounted  on  a  heavy  cast  iron  base  in 
the  form  of  one  simple  and  compact  unit — the  belt  is  endless,  oak  tanned  and 
impervious  to  steam,  water  or  acids.  Pump  can  be  operated  by  either  direct 
or  alternating  current  motors. 

We  guarantee  the  satisfactory  working  of  these  pumps — each  pump  is 
thoroughly  tested  before  leaving  our  factory — all  bearings  are  carefully 
lubricated,  ready  for  operation. 

No  other  electric  pump  is  so  well  adapted  for  use  in  connection  with 
air  line  vacuum  heating  systems  for  residence,  apartment  buildings,  hotels, 
office  buildings,  schools  and  other  23ublic  buildings,  including  large  stores 
and  industrial  plants. 

The  pumps  are  silent  in  operation.  They  are  provided  with  an  auto¬ 
matic  vacuum  controller,  so  arranged  that  when  the  vacuum  drops  to  five 
inches  on  the  air  line,  the  motor  automatically  starts  the  pump  and  imme¬ 
diately  runs  the  vacuum  up  to  ten  inches,  at  which  point  the  current  is 
automatically  cut  off  and  the  pump  is  shut  down.  The  big  advantage  of  this 
system  of  control  is  that  you  are  only  using  current  for  short  periods.  This 
makes  the  equipment  unusually  economical  and  efficient  in  operation,  because 
you  are  not  wearing  out  your  equipment  by  continuous  operation — an  ad¬ 
vantage  in  economy  well  worth  your  serious  consideration. 


22 


H  EAT  I  N  Gh  ♦7V\C  3PEC1ALTI  E5 


1.  Impeller.  3.  Ball  bearings.  5.  Inlet. 

2.  Crank  shaft.  4.  Hinged  Wall.  6.  Discharge. 


Capacities  and  Prices  of  the  McAlear  Electric  Air  Line 

Vacuum  Pumps 


No.  of 
Pump 

Max.  Cap. 

Sq.  Ft.  Direct 
Radiation 

Horse 
Power  of 
Motor 

Actual  Dls- 
plac’t  cu.  ft. 
Per  Minute 

Space  Req’d 
for  Pump 
Inches 

List  Price 

Approx. 

Shipping 

Weight 

10 

4000 

12  X  22 

$353.14 

300 

11 

6000 

^4 

6 

12  X  22 

411.90 

350 

12 

10000 

Vz 

10 

12  X  24 

555.06 

450 

13 

20000 

Vz 

20 

14x30 

891.00 

550 

14 

28000 

% 

35 

14x30 

990.00 

700 

15 

35000 

14x36 

1,126.40 

800 

In  ordering  pumps  be  sure  to  state  whether  the  current  is  direct  or 
alternating,  giving  the  voltage,  cycle,  and  phase. 

We  will  guarantee  the  satisfactory  operation  of  our  pumps  only  when 
used  in  connection  with  the  radiation  set  opposite  each  size  in  the  above  table. 
In  ordering  pumps,  please  state  the  amount  of  radiation  in  square  feet  of 
direct  radiation  and  square  feet  of  blast  coil  or  vento  radiation,  if  there  be 
any.  The  above  capacities  are  based  on  square  feet  of  direct  radiation  only. 

In  order  to  determine  the  size  pumps  for  blast  coil  work,  multiply  the 
square  feet  of  blast  coil  or  vento  radiation  by  two  and  select  a  pump  suitable 
for  the  work. 

The  above  prices  include  pump  and  motor  complete  with  sub-base,  ex¬ 
pansion  tank,  gauge  glass,  vacuum  gauge,  automatic  electric  switch, 

vacuum  controller  and  check  valve  in  air  connection  between  the  expansion 
tank  and  pump. 

All  of  the  materials  delivered  f.  o.  b.  cars,  Chicago. 


23 


For  Old  or  New  Heating  Plants 

For  a  description  of  the  air  piping  system  see  specifications,  on  Pages 
33  to  35  inclusive. 

The  McAlear  Electric  Vacuum  Pumps  can  be  installed  in  connection 
with  old  or  new  heating  plants,  having  what  is  known  as  a  one  or  two  pipe 
system.  When  installed  in  connection  with  plants  already  in  operation,  the 
air  piping  is  usually  run  to  correspond  to  the  steam  piping  and  the  con¬ 
nections  to  the  radiators  are  made  to  an  automatic  air  valve  that  is  usually 
placed  about  midway  the  radiator. 

When  installing  the  air  piping  system,  care  should  be  taken  to  ream 
out  the  pipes  and  see  that  all  joints  are  made  properly  and  that  they  are 
put  together  with  asphaltum  so  as  to  make  them  absolutely  air  tight. 

When  the  air  piping  is  installed,  a  test  should  be  made  as  hereinafter 
outlined  in  the  air  piping  specifications,  pages  33  to  35  inclusive. 

If  the  air  piping  is  properly  installed  and  will  stand  the  test  prescribed, 
the  pump  will  be  able  to  produce  10  inches  of  vacuum  in  10  or  15  minutes 
from  the  time  the  service  switch  automatically  starts  the  motor  and  pump. 
This  vacuum  will  be  sufficient  to  exhaust  the  air  from  the  radiators  and  dis¬ 
charge  it  to  the  atmosphere.  When  the  air  is  all  exhausted  and  the  vacuum 
reaches  10  inches,  the  automatic  electric  vacuum  controller  cuts  off  the 
current  and  shuts  the  pump  down.  The  pump  will  remain  shut  down  until 
the  vacuum  on  the  air  line  drops  to  five  inches,  at  which  point  the  automatic 
vacuum  controller  throws  the  controlling  switch  and  starts  the  pump  and 
again  brings  the  vacuum  up  to  10  inches  at  which  point  the  current  is  again 
cut  off  and  the  pump  closes  down.  In  operating  the  pump  automatically  in 
this  manner  it  reduces  the  cost  of  operation  to  a  minimum,  and  increases 
the  life  of  the  pump  and  motor. 

The  actual  cost  of  operating  the  pump  amounts  to  only  a  few  cents 
per  day  for  the  electric  current  used. 


24 


HEATl  N  G-  «7V\5;/S;LE7|R*-3PE:CIALT1E5 

Fourteen  Distinct  McAlear  Advantages 


1st — A  positive  and  uniform  circulation  of  steam 
throughout  the  entire  heating  system  AT  or 
liELOW  atmospherie  pressure. 

2nd — Greatest  economy  by  utilizing  heat  of  steam  at 
low  temperatures. 

.‘3rd — Noiseless  and  safe — will  not  foul  the  air  in  the 
room,  no  leakage  or  dripping  from  air  vah^es — 
no  possibility  of  damage  to  furnishings — guar¬ 
anteed  to  he  a  SEALED  SYSTEM. 

1th — The  independent  and  positive  removal  of  the  air 
and  water  of  eondensation  from  the  heating  ap¬ 
paratus. 

5th — Continuous  satisfactory  service  always  at  an  ex¬ 
ceptionally  low  maintenance  and  repair  cost. 

6th — Saves  money  because  no  power  is  required  to 
operate  the  modern  McAlear  Steam  Operated 
\"acuum  Pump — simply  make  connections  and 
the  pum]i  does  the  rest. 

7th — Absolutely  automatic — no  starting  or  stopping  the 
pump — no  valves  to  open  or  close — no  skilled 
labor  required. 

8th — So  simply  constructed  and  works  with  such  me¬ 
chanical  ])recision  that  there  is  nothing  to  get 
out  of  order — requires  no  oiling,  attention  or 
])ay  roll. 

9th — Fuel  saver  because  it  heats  up  in  I. ESS  THAN 
HALF  TtlE  TOIE  required  by  other  systems 
and  never  “overlooks”  a  radiator  on  the  line  no 
matter  where  located. 

10th — Saves  labor  and  coal  because  of  the  long  intervals 
between  firing. 

11th — Superior  to  other  “vapor”  or  “vacuum”  systems 
because  it  maintains  heat  during  the  night  bet¬ 
ter  and  longer. 

12th — Less  exjjense  because  less  steam  used,  less  coal 
burned  to  heat  a  given  space — the  McAlear  Sys¬ 
tem  ])roduces  heat  at  the  minimum  cost. 

1.3th — No  royalties  charged  for  the  use  of  the  IMcAlear 
System. 

1  ith — Iron  Clad  Guarantee  to  replace  FREE  OF 
CHARGE  any  defective  parts  of  any  materials 
furnished  by  us — see  l)age  3. 


25 


VAC uuM  jy  * ♦  vapor  h eat 

McAlear  Thermo  Vent  Automatic  Air  Valve 


No  Adjusting  —  “Fool-proof” 

The  ^4  X  yg  inch  Thermo  Vent  Automatie  Air  Valves  are  used  in 
conneetion  with  the  MeAlear  System  of  Vaeuum  Heating  or  any  other  air 
line  vacuum  or  drip  pipe  work.  Beeause  of  their  design  and  construetion, 
no  adjustment  is  neeessary  either  at  the  factory  or  on  the  job.  This  is 
an  important  advantage  because  it  insures  perfect  operation  of  the  system 
and  hot  radiators  at  all  times.  Contractors  and  Engineers  will  appreciate 
this  advantage  as  it  eliminates  the  trouble  and  expense  so  often  experienced 
in  having  to  adjust  and  put  in  order  the  so  called  “automatic”  air  valves 
formerly  used  for  this  purpose. 

The  McAlear  Thermo  Vent  Automatic  Air  Valves  are  “fool”  proof — 
they  cannot  be  tampered  with  or  put  out  of  order.  Each  valve  is  provided 
with  a  movable  hex  nipple  No.  1  so  that  if  one  should  happen  to  break  when 
connecting  the  valve  to  the  air  lines  and  radiators,  all  the  expense  incurred 
to  make  the  valve  as  good  as  new  would  be  a  few  cents  for  another  nipple. 
The  McAlear  is  superior  to  all  other  valves  in  this  respect.  If  this  nipple 
should  break  on  any  other  make  of  valve,  the  valve  would  have  to  be  thrown 
into  the  scrap  heap  at  a  total  loss  to  the  purchaser  because  it  could  not 
be  repaired. 

In  addition,  the  McAlear  has  another  decided  improvement  over  all 
other  makes  of  valves.  A  hex  tail  piece  No.  6  is  used,  which  enables  the 
steam  fitter  to  screw  it  on  to  a  pipe  with  a  monkey  wrench,  thus  preserving 
the  nickel  plating  with  no  possibility  of  marring  the  appearance  of  the 
valve. 

(h'or  prices  see  page  29) 


26 


HEATING-  ♦7V\C/^LEAR*’^PE:CIALT1E5 


McAlear  Thermo  Vent  Automatic  Air  Valve 


Actual  Size 
No.  22 


This  list  of  repair 
parts  is  suitable  for 
all  valves  from  No. 
22  to  36  inelusive, 
except  part  No.  1 
which  is  only  fur¬ 
nished  with  No.  22 
valve. 


IJST  OF  PARTS 

1.  — Hex  Nipple 

2.  — Valve  Body 

3.  — Disc  Plate 

i. — Expansion  Disc 

5.  — Cap 

6.  — Hex  Tail  Piece 

7.  — Union  Nut 


27 


\^cuuM  6"  heat 

McAlear  Thermo  Vent  Automatic  Air  Valve 


Inlet 


These  Valves 
have  a  full  §" 
opening. 


Actual  Size 
No.  24 


This  valve  is  similar  in  construction  to  No.  26,  except  that  the  part 
that  connects  with  the  radiator  or  coil  is  tapped  for  pip®  place  of 

with  union  as  is  the  case  with  the  No.  26.  The  union,  however,  in  the 
No.  2i  is  placed  on  the  discharge  side  of  the  valve  and  the  tail  piece  will 
be  furnished  with  either  male  or  female  thread. 

These  valves  are  used  for  the  same  or  similar  purposes  as  figure  No. 
26.  They  are  especially  suitable,  however,  for  use  in  connection  with 
Blast  Coils,  Vento  Radiation  and  relieving  mains  of  air  pockets,  etc.  In 
fact,  any  service  where  a  large  volume  of  air  is  to  be  removed  in  the  shortest 
possible  time. 

The  valves  are  non-ad justable  and  embody  the  same  principles  of  con¬ 
struction  as  tliose  so  successfully  used  in  our  Thermo  Vent  Automatic  Air 
\'’alvc.  No.  22. 

In  ordering,  state  steam  pressures  and  whether  for  use  in  connection 
with  vacuum  or  pressure  systems. 

For  prices,  see  Page  29. 


28 


HEATING' 


McAlear  Thermo  Vent  Automatic  Air  Valve 


Inlet 


These  valves 
have  a  full 
§"  opening 


Actual  Size 
No.  24 


The  McAlear  Tliermo  Vent  Automatic  Air  Valves  are  recommended  for 
use  in  connection  with  Fan  Coils,  Vento  Radiation  and  the  McAlear  System 
of  vacuum  heating,  as  they  are  necessary  to  insure  its  perfect  and  suc¬ 
cessful  operation. 

We  do  not  hesitate  to  unqualifiedly  guarantee  these  valves  to  be  perfect 
in  design,  workmanship  and  material,  and  to  be  absolutely  automatic  and 
non-adjustable,  also  to  ]iass  air  in  large  (piantitics  and  to  close  absolutely 
tight  against  steam,  whether  used  in  connection  with  gravity  or  vacuum 
heating  systems.  It  is  understood  that  when  these  valves  are  used  in  con¬ 
nection  with  gravity  or  vacuum  heating  systems  they  are  to  be  provided  with 
drij)  pipes. 

In  ordering,  state  service  and  pressures. 


No.  22,  Size  ^2.50  each 

No.  24.,  Size  jixyi" .  5-00  each 

No.  26,  Size  yxYz" .  6.00  each 


Liberal  discounts  from  above  prices  will  be  given  to  the  trade. 


29 


VACUUM  <y  heat 


McAlear  Thermo  Vent  Automatic  Air  Valve 


Inlet 


These  valves 
have  a  full 
§"  opening 


Actual  Size 
No.  26 


Cannot  Be  Injured  by  High  Steam  Temperatures 

The  3^  X  3^  inch  McAlear  Thermo  Vent  xVutoniatic  Air  Valve  illus¬ 
trated  above  is  used  in  connection  Avith  vento  radiation  and  fan  coil  work, 
or  any  other  work  in  which  a  valve  must  pass  large  quantities  of  air  in  the 
shortest  possible  time. 

These  valves  have  a  full  ^  inch  opening.  They  can  be  used  in  con¬ 
nection  Avith  vacuum  or  gravity  Avork  and  are  also  admirably  adapted  for 
service  in  connection  Avith  relieving  fan  coils,  vento  radiation,  supply  and 
return  mains  of  air  pockets,  etc. 

No  expense  has  been  spared  in  the  construction  of  these  A’alves.  The 
best  quality  of  government  metal  is  used — the  discs  are  made  of  a  high 
grade  quality  of  bronze  securely  fastened  to  heaAy  brass  plates,  which 
ahvays  retain  their  shape.  The  expansion  discs  are  made  of  phosphor  bronze 
and  are  charged  Avith  a  A'olatile  fluid  that  A'aporizes  at  low  temperatures. 
As  an  additional  safeguard,  these  discs  have  a  movement  four  times  greater 
than  is  actually  necessary  to  close  the  valve  Avhen  subjected  to  the  steam 
temperatures.  With  this  unusually  large  factor  of  safety  the  expansion 
disc  shovdd  last  indefinitely,  especially  AAdien  you  take  into  consideration  the 
fact  that  the  discs  are  placed  on  the  discharge  side  of  the  vaWe,  thus  making 
it  IMPOSSIBLE  for  the  high  steam  temperatures  to  injure  them  in  any 
way — the  minute  the  steam  comes  in  contact  Avith  them,  they  Avill  auto¬ 
matically  expand  and  close  the  opening  through  which  the  steam  enters  the 
chamber  in  Avhich  the  discs  are  placed. 

(For  Prices  see  Page  29) 


30 


HEATING^*  7y\C  ^  LEP  R  ♦  ^  P  EC  I A  LT I E5 
McAlear  Thermo  Vent  Automatic  Air  Valve 


Inlet 


These  valves 
have  a  full 
I"  opening 


Actual  Size 
No.  26 


Self  Cleaning  —  Self  Protecting 


The  McAlear  Thermo  Vent  Automatic  Air  Valves  are  the  result  of 
years  of  experience  and  represent  the  highest  degree  of  engineering  and 
inventive  efficiency.  They  never  require  any  adjustments  and  are  sealed  so 
that  it  is  impossible  for  anyone  to  tamper  with  them  in  any  way.  They  are 
positive  in  action  and  absolutely  noiseless  in  operation. 

The  non-ad justable  advantage  is  worthy  of  your  serious  consideration 
because  it  relieves  the  contractor  of  the  responsibility,  trouble  and  expense 
of  adjusting  the  valves  after  they  are  in  operation.  This  means  a 
worth  while  saving  in  money,  time  and  labor  to  the  eontraetor, 
as  well  as  the  owner — and  it  also  insures  perfect  service — a  per¬ 
fect  circulation  of  steam  and  is  a  guarantee  of  hot  radiators  at 
all  times  under  any  and  all'conditions. 

These  McAlear  Air  Valves  are  also  self-cleaning  and  the  expansion 
discs  are  self-protecting.  We  furnish  these  valves  for  use  in  connection  witli 
high  pressure  steam  plants  as  well  as  for  low  pressure  vacuum  heating 
systems. 

In  ordering  valves  for  high  pressure  steam  service,  always  state  the 
initial  pressures  as  we  furnish  special  discs  suitable  for  any  pressure  uj) 
to  and  including  100  pounds.  Therefore,  clearly  state  the  service  and  pres¬ 
sure  that  the  valve  is  to  operate  in  connection  with. 

(For  Prices  see  Page  29) 


31 


™  3AnwAHviu  ™  3a-tva  «v 


VACUUM  6^  heat 


32 


Application  of  the  McAlear  Vacuiun  Pump  and  Air  Line  System  of  ^’'ac•uum  Heating 
used  in  connection  with  high  pressure  Imilers. 


H  EAT  I  N  G-  ALERR*  3PEC1ALTI  ES 

Specifications  for  the  Installation  of  the  McAlear 
Air  Line  Vacuum  System  of  Heating 

Furnisli  and  install  the  necessary  air  pi})ing  and  apparatus  for  cquip- 
2)ing  the  entire  })lant  with  the  McAlear  System  of  Positive  Steam  Circula- 
tioip  supplying  all  the  necessary  air  valves,  vacuum  2)ump,  pijjing,  etc., 
comi)lete,  as  hereinafter  S2)ecilied. 

Air  Piping  System  for  Direct  Radiation 

h'rom  the  automatic  air  valves  on  all  radiators  and  coils,  run  quarter 
inch  connections  and  tie  into  ^g-inch  horizontal  arms  which  are  ])laced  and 
connected  to  3^-inch  risers  run  to  corres])ond  with  the  steam  risers.  These 
risers  are  continued  to  basement  and  there  connected  with  one-inch  mains, 
which  are  run  to  corresjoond  with  the  steam  mains,  (the  air  mains  to  be 
divided  into  the  same  number  of  circuits  as  the  steam  mains)  and  graded 
so  that  they  will  drain  towards  the  pump.  The  1-inch  mains  to  be  con¬ 
nected  to  the  McAlear  Automatic  Vacuum  Pump  located  where  shown  on 
])lans  or  where  directed  by  the  engineer  or  architect,  as  hereinafter  sj^ec- 
itied. 

Place  cut  off  valves  in  all  branch  mains  and  in  each  circuit  where  they 
connect  with  the  Vacuum  Pump,  so  that  any  one  or  all  can  be  cut  out  of 
service  if  desired. 

Air  Piping  System  for  Fan  Coil  Work 

From  the  automatie  air  valves  on  each  section  of  the  fan  coils,  run 
)/^-inch  connections  and  tie  into  1-inch  mains  run  on  ceiling  of  basement 
(as  shown  on  })lans  or  as  directed)  to  the  vacuum  jjumjj  and  there  connect 
them  to  1^-inch  header  sui^jiorted  in  the  pro^jer  manner  to  receive  all  air 
mains  connections,  etc.,  including  the  mains  from  the  direct  radiation  system. 

Place  in  )/2-inch  connections  to  each  air  valve  on  fan  coils,  cut  off  valves, 
so  that  any  section  can  be  cut  out  of  service  without  interfering  with  the 
balance  of  the  system  if  desired. 

Also  place,  where  directed,  in  each  branch  main  to  reheating  and  tem¬ 
pering  coils,  cut  off  valves.  All  pijjing  from  air  valves  must  be  graded,  so 
that  it  will  drain  towards  the  vacuum  ])ump  and  the  air  valves  must  be  so 
])laced  that  they  will  drain  either  into  the  coils  or  radiators  with  which 
they  connect,  or  into  the  air  mains.  Place  cut  off'  valves  in  the  air  mains 
at  pum])  so  that  any  section  of  the  air  piping  system  can  be  cut  off  from  that 
])oint. 

Automatic  Air  Valves 

Furnish  and  jilace  on  each  radiator  and  coil,  one  Thermo  Vent  Auto¬ 
matic  Air  Valve,  size  coiniect  same  as  above  S2)ecified. 

Also  furnisb  and  ))lace  on  each  section  of  the  fan  coils,  one  or 

j/>x)/^-inch  Thermo  Vent  Automatic  Air  Valve  and  connect  same  as  above 
specified. 

These  valves  are  non-ad justable,  therefore,  it  will  not  be  necessary  for 
the  contractor  to  figure  on  adjusting  them  after  the  job  is  jmt  in  operation. 


33 


VACUUM  ♦MfZS'lEKlii*  VAPOR  heat 

Valves 

All  valves  used  in  connection  with  the  air  piping  system  and  other 
connections  around  pump,  must  be  of  the  straight-way  pattern  and  thor¬ 
oughly  packed  with  a  good  quality  of  moulded  packing,  so  that  they  will 
he  absolutely  tight  when  in  service,  valves  to  be  equal  to  those  manufac¬ 
tured  by  the  Chapman  Valve  Company  or  Crane’s  best. 

Fittings 

All  fittings  used  in  connection  with  the  Vacuum  System,  shall  be  best 
quality  of  gray  cast  iron,  heavy  pattern  with  clean  cut  threads. 

Pipes 

All  piping  used  in  connection  with  the  Vacuum  System  shall  be  of  a 
good  quality  of  wrought  galvanized  iron.  All  piping  to  be  carefully  reamed 
out  and  must  have  clean  cut  threads;  joints  to  be  put  together  with 
asphaltum  (the  asphaltum  to  be  placed  on  the  pipe  threads  and  not  in  the 
fittings)  and  when  complete,  must  stand  a  pressure  test  of  forty  pounds  per 
square  inch,  throughout  the  entire  system.  Test  to  be  made  with  air  or 
water  in  the  presence  of  a  representative  of  the  Architect  or  the  Vacuum 
Company,  as  hereinafter  specified. 

Test 

In  making  test,  cap  all  connections  to  air  valves  and  make  sure  that 
all  cut  off  valves  throughout  the  entire  system  of  air  piping  are  wide  open, 
then  turn  into  the  system,  either  air  or  water  under  a  pressure  of  forty 
pounds  to  the  square  inch.  Where  directed,  place  pressure  gauges  at  the 
ends  of  the  long  runs  for  the  purpose  of  determining  the  pressure  at  these 
points. 

If  leaks  are  found,  they  must  be  properly  marked  and  repaired  and 
after  repairing,  if  in  the  judgment  of  the  engineer  or  representative  of  the 
Vacuum  Company,  a  second  test  is  necessary,  the  contractor  must  make 
same  and  demonstrate  to  the  satisfaction  of  all  parties  concerned,  that  the 
system  of  piping  is  absolutely  tight  and  will  hold  the  pressure  hereinbe¬ 
fore  referred  to  indefinitely  without  any  perceptible  drop. 

Vacuum  Pump 

Furnish  and  place  where  shown  or  directed,  one  McAlear  Automatic 

Vacuum  Pump  of  suitable  capacity  for  handling - square  feet  of  direct 

radiation  and - lineal  feet  of  fan  coils.  Make  all  the  necessary  steam, 

water  and  air  connections  to  pump  as  directed  and  as  required  by  the  manu¬ 
facturers,  placing  in  all  connections,  the  necessary  cut  off  and  check  valves. 

Connections  to  Vacuum  Pump 

Steam  connections  to  pump  must  be  taken  direct  from  tbe  boiler 
header  through  a  Kieley  98  pressure  reducing  valve  if  the  steam  pressure 
exceeds  10  pounds.  If  less  than  10  pounds  a  reducing  valve  will  not  be 
required.  If  a  reducing  pressure  valve  is  used  place  it  in  the  steam  con¬ 
nection  at  or  near  the  boiler  and  arranged  with  by-pass  and  cut  off  valves, 
so  that  the  valve  can  be  removed  for  repairs. 

The  steam  supply  pipe  from  the  pressure  reducing  valve  to  pump  to 
be  one  size  larger  than  that  called  for  by  the  pump,  and  at  a  point  near  the 


34 


HEATING-  *7V\C7TL£J:^R  «  specialties 


pump  reduced  to  the  proi)cr  size  and  provided  with  cut  off  valve  and 
steam  gauge  of  tlie  size  hereinafter  s])ecified. 

Water  connections  to  pump  to  be  taken  from  City  water  supply 
and  run  one  size  larger  than  that  called  for  to  pump.  If  the  City  water 
pressure  exceeds  fifty  pounds,  place  in  the  connection  at  or  near  the 
jnimp,  a  Kieley  water  pressure  redueing  valve  and  regulate  same  to  main¬ 
tain  a  pressure  not  to  exceed  fifty  pounds  on  pump  connection.  Place  in 
the  w^ater  connection  at  or  near  the  pump,  cut  off  valve  and  pressure 
gauge. 

Air  connection  to  pump  to  be  made  in  the  manner  indicated  on 
blue  print  accompanying  pump.  The  directions  and  instructions  given  on 
blue  print  must  be  followed  carefully  and  all  connections  must  be  made  in 
accordance  therewith.  Place  in  air  connections  at  or  near  the  pum]),  cut 
off  valve  and  vacuum  gauge. 

Discharge  from  pump  to  be  connected  with  sewer  or  catch  basin 
of  the  size  called  for,  making  sure  that  there  is  no  back  pressure  from  the 
sewer  and  that  the  discharge  is  free  and  open  to  the  atmospliere.  Tliere 
must  not  be  any  trap  or  seal  in  the  sewer  connection  beyond  where  tlie 
discharge  from  pump  is  connected. 

Steam  Pressure  Reducing  Valve 

Furnish  and  install  where  directed,  one  2^"  Kieley  98,  special  re¬ 
ducing  valve.  This  valve  to  be  arranged  with  by-pass  as  hereinbefore 
specified,  and  regulated  so  as  to  maintain  one  pound  steam  pressure  on 
pump.  This  valve  is  only  necessary  where  the  steam  pressure  exceeds 
10  pounds. 

Water  Pressure  Reducing  Valve 

Furnish  and  place  in  water  supply  to  pump,  when  City  pressure  ex¬ 
ceeds  fifty  pounds  one  \"  Kieley  water  reducing  valve  and  regulate  same 
to  maintain  a  pressure  not  to  exceed  fifty  pounds  on  the  pumj)  supply. 

Gauges 

Furnisli  with  vacuum  system  one  Vaeuum  gauge,  and  one  3^" 

Steam  pressure  gauge,  all  gauges  to  be  furnished  by  the  manufacturers  of 
the  Vacuum  System,  but  must  be  installed  in  place  by  the  contractor  as 
hereinbefore  specified. 

Instructions 

Engineer’s  bulletin  and  drawings  showing  how  the  pump  and  Vacuum 
S3'^stem  is  installed  and  operates,  must  accompany  the  pump  and  the 
instructions  given  therein,  must  be  followed  carefully  by  the  contractor 
installing  the  work. 

The  instructions  to  he  given  the  engineer  after  the  plant  is  completed 
and  in  operation  and  the  instructions  thereon  must  be  carefull}'  followed 
bv  the  operating  engineer. 

Painting 

Paint  all  vacuum  piping,  connections,  fittings,  etc.,  witli  two  coats 
of  asphaltum.  Painting  to  be  done  when  the  plant  is  in  operation  and 
a  vacuum  is  on  the  system. 


35 


VACUUM  &'  ♦MfMlERil*  vapor  heat 


Sparks  Automatic  Vacuum  Pump 

(Patented  and  Patents  Pending) 


Automatic  Vacuum  Pump 
Company  now  changed  to 
The  McAlear  Manufac¬ 
turing  Company. 


'Die  personnel  of  our  Coin- 
))any  has  not  been  ehanged  in 
any  way — but  we  have  made 
several  ebanges  and  decided  im- 
])rovements  in  our  line  of 
pinups  and  vaeuinn  beating  spe¬ 
cialties,  hereafter  to  be  known 
as  the  “McAlear  System”  and 
s])ecialties. 

^^'e  will  manufacture  and 
can  furnish  promptly  to  any 
one  desiring  same,  S  ])  a  r  k  s 
Pum])s  of  the  type  illustrated 
above,  also  repairs  and  renewals 
for  all  of  the  different  style 
Sparks  Pumps  now  in  use. 

The  im])roved  McAlear  line 
of  Pumps  are  so  much  better 
than  the  Sparks  (heretofore 
manufactured  by  the  Automatic 
\bicuum  Pump  Co.)  that  we  do 
not  hesitate  to  urge  all  owners 
of  Sparks  Pumps  to  convert 
them  into  McAlear  Pumps, 
which  can  be  easily  done  by 
removing  the  Sparks  Pump 
Head  and  installing  in  its  place 
the  McAlear  Pump  Head.  To 
make  this  change  we  will  furnish  drawings  showing  bow  to  do  the  work, 
together  with  a  price  covering  the  cost  of  the  necessary  material.  In  the 
McAlear  type  of  pump  there  are  no  adjustments  or  levers  of  any  kind  to 
get  out  of  order  or  that  will  require  attention — the  possibility  of  trouble 
has  been  entirely  eliminated. 


36 


HEATING'  ♦ 


I  V, 


♦  SPECIALTIES 


37 


38 


Application  of  the  McAlear  two  pipe  system  of  vacuum  heating  returning 
the  water  of  condensation  direct  to  the  boiler  and  discharging  the  air  to  the 
atmosphere  by  means  of  the  McAlear  return  trap  and  vacuum  pump. 


H  EAT  I  N  G-  ALEAR*  .SPECIALTl  E5 

McAlear  Two  Pipe  Vacuum  System  of  Heating 

The  illustriition  on  page  38  shows  a  typical  installation  of  a  McAlear 
Two  Pipe  Vacuum  System  of  Heatings  returning  the  water  condensation 
direct  to  the  boiler  by  means  of  the  improved  McAlear  Air  Exhauster 
and  Return  Trap,  discharging  the  air  taken  from  the  system  by  means 
of  the  McAlear  Pump  into  the  smoke  breeching. 

With  this  equipment  the  MeAlear  Pump  pulls  a  vaeuum  on  the  return 
tra}) — the  return  mains  thereby  pulling  the  water  of  condensation  and 
air  from  the  entire  system  back  to  the  trap,  separating  the  air  from  the 
water  in  the  trap — discharging  the  air  to  the  atmosphere  and  the  water 
into  the  boiler. 

When  the  trap  fills  with  water,  the  float  automatically  opens  the  valve 
in  the  steam  equalizing  pipe — this  equalizes  the  pressure  on  the  trap  and  at 
the  same  time  closes  the  vacuum  connection  to  the  trap,  thereby  allowing 
the  water  to  be  discharged  into  the  boiler.  After  the  water  is  discharged, 
the  trap  automatically  closes  the  valve  in  the  equalizing  pipe  and  opens  the 
valve  in  the  vacuum  connection,  again  allowing  the  vacuum  produced  by  the 
McAlear  pump  to  pull  the  air  and  water  from  the  heating  system  back  into 
tlie  trap.  Each  action  being  simple,  positive  and  quick. 

Tlie  big  advantage  of  this  entire  equipment  is  that  it  is  absolutely 
automatic,  positive  and  dependable  in  operation.  If  connected  in  the  man¬ 
ner  indicated,  it  will  enable  you  to  operate  any  return  line  vacuum  system 
of  heating,  low  pressure  gravity  or  otherwise,  with  the  same  degree  of 
efficiency  and  economy  as  though  high  pressure  steam  driven  pumps  were 
employed  to  produce  the  vacuum  and  return  the  water  of  condensation  to 
tlie  boiler — but  at  a  much  loxver  operating  and  maintenance  expense. 

This  improved  system  can  be  operated  equally  satisfactorilv  with  a 
maximum  steam  jiressure  of  half  a  pound  or  any  pressure  above  lialf  a 
pound.  It  is  not  necessary  that  the  boiler  pressure  be  the  same  as  the  pres¬ 
sure  on  the  heating  system.  The  boilers  can  be  run  high  pressure  and  a 
reducing  valve  installed  in  the  heating  main  to  reduce  the  steam  for  heating 
jmrposes  to  any  low  pressure  desired. 

The  improved  McAlear  Pump  is  extremely  flexible — it  can  be  operated 
on  a  lialf  pound  steam  pressure — the  McAlear  Air  Exhauster  and  Return 
Trap  will  operate  on  any  pressure  from  half  a  pound  to  100  pounds  or 
higher,  if  desired. 

The  problem  of  successfully  eliminating  air  and  returning  water  of  con¬ 
densation  from  heating  systems  to  boilers  has  been  a  troublesome  one  and  one 
which  commands  considerable  attention  of  the  engineering  profession  and 
others  who  have  had  experience  with  heating  systems.  There  has  been  a 
great  many  different  kinds  of  appliances  used  in  attempting  to  accomplish 
the  desired  result,  but  it  remained  for  the  JMcAlear  System  to  successfully 
solve  the  problem — we  are  confident  that  no  other  system  is  so  reliable  and 
])ositive  in  operation.  Tliis  you  can  prove  to  yourself  by  a  study  of  our 
different  systems  and  appliances — indisputable  evidence  that  we  are  able  to 
successfully  handle  air  and  w'atcr  in  any  quantity  from  heating  systems  in  a 
very  positive,  reliable,  efficient  and  economical  manner. 


39 


MOOULAT1N<3  rv!ODUU/®sTlN<a 

VAUVE .3^rvTVtV^T^^^^  VAUVE 


40 


Application  of  tlie  McAlear  Vapor  system  of  heating. 


HEATING^  «7V\^^LEAR*-SPECIALT1E5 
McAlear  Vapor  System  of  Heating 

Tlie  application  drawing  on  opposite  page  shows  a  typical  installation 
of  the  McAlear  Vapor  System  of  heating  returning  the  water  of  condensa¬ 
tion  from  the  heating  system  to  the  boiler  automatically  by  means  of  the 
McAlear  Air  Exhauster  and  Return  Trap.  The  Air  Exhausted  from  the 
system  is  discharged  into  chimney  through  vent  pipe. 

\Vith  the  system  arranged  in  this  manner^  the  water  from  the  heating 
system  is  returned  to  the  boiler  direct  or  through  the  McAlear  return  trap, 
and  the  condensation  from  the  mains  is  returned  to  the  boiler  without  the 
aid  of  the  INIcAlear  Return  Trap,  if  so  desired.  The  equipment  is  very 
simple,  positive,  reliable  and  automatic  in  operation,  requiring  no  attention 
on  the  jjart  of  anyone  as  there  are  no  parts  to  be  oiled  or  adjusted. 

The  jNfcAlear  Air  Exhauster  and  Return  Trap  when  connected  up  in 
the  manner  indicated  operates  only  when  the  boiler  pressure  is  too  high  to 
permit  the  condensation  from  the  heating  system  to  return  direct  by  gravity. 
This  pressure  depends  entirely  on  the  distance  between  the  water  line  in 
the  return  trap  and  the  water  line  in  the  boiler.  These  traps  are  con¬ 
structed  to  operate  on  a  difference  of  6  inches  to  8  inches  in  the  water  line. 
That  is,  the  water  line  in  trap  can  be  placed  at  a  minimum  of  6  inches  above 
water  line  of  the  boiler.  A  greater  distance  than  this,  however,  if  it  can 
be  had,  will  do  no  harm.  In  fact,  the  greater  the  distance  between  the 
two  water  lines,  the  less  work  the  trap  will  be  called  upon  to  perform. 

Mdien  the  pressure  on  the  boiler  is  too  high  for  the  water  to  return 
direct  by  gravity,  it  will  be  forced  over  into  the  trap  and  when  the  float 
raises  sufficiently  to  trip  the  valve  mechanism,  it  will  equalize  the  jjressure 
in  the  trap  with  that  of  the  boiler  and  at  the  same  time  close  air  vent  out¬ 
let,  allowing  the  water  contained  in  trap  to  run  into  the  boiler.  When  the 
water  is  all  discharged  from  trap,  the  float  reverses  the  valve  mechanism 
closing  the  equalizing  valve  and  opening  the  air  vent  valve  again  allowing 
the  trap  to  fill  with  water  of  condensation. 

Cut  off  valves  and  check  valves  should  be  placed  in  the  connections 
as  indicated  and  air  vent  from  trap  should  be  connected  to  smokestack. 

With  the  McAlear  system  of  vapor  heating,  you  will  be  able  to  control 
each  radiator  independently  of  the  other  by  setting  the  ISIcAlear  graduated 
valve  to  heat  any  portion  of  the  radiator  desired  and  by  using  the  McAlear 
Perfection  Radiator  Trap  on  the  returns  from  each  radiator,  you  will  be 
able  to  absolutely  control  the  amount  of  heat  given  off  as  the  Perfection 
Radiator  Trap  acts  as  a  check  and  prevents  the  atmospheric  pressure  from 
forcing  air  into  the  radiator  and  system,  thereby  keeping  each  radiator 
unit,  and,  in  fact,  the  entire  system,  in  the  best  possible  condition  to  cir¬ 
culate  and  receive  steam.  \Vith  the  McAlear  system  you  can  bring  into  use 
every  square  inch  of  heating  surface  as  a  heat  distributor  or  you  can  control 
it  to  maintain  the  required  temperature  by  allowing  the  steam  to  enter  just 
enouffh  of  the  radiating;  surface  to  do  the  work  in  a  satisfactory  and  econom- 
ical  manner.  In  other  words,  the  system  is  so  flexible  that  it  can  be  adjusted 
and  operated  to  meet  any  condition  from  a  minimum  to  a  maximum  which 
must  mean  economy  and  efficiency,  all  of  which  we  are  striving  to  get  in 
heating  and  power  equipments. 


41 


VACUUM  <y  ♦Mf  Z^X.EJIEi»  vapop  heat 


42 


Application  drawing  showing  the  manner  of  returning  water  of  condensation  from  a  McAlear  two 
pipe  vacuum  system  of  heating  direct  to  the  boiler,  the  McAlear  Vacuum  Pump  pulling  a  vacuum 
on  both  tra])s  and  discharging  the  air  exhausted  from  the  system  direct  to  the  atmosphere. 


HEATING- 


♦  c5PECIALTlE5 


McAlear  Two-pipe  Vacuum  System  of  Heating 

The  line  drawing  on  page  42  shows  a  typical  system  of  returning 
water  from  a  vacuum  heating  system  to  the  boiler  automatically  by  means 
of  tlie  iSIcAlear  Return  Traps  and  Vacuum  Pump  discharging  the  air  ex¬ 
hausted  from  the  system  directly  to  the  atmosphere  or  smoke  stack. 

This  system  is  especially  adapted  for  use  in  connection  with  Vacuum 
Heating  where  the  returns  are  below  the  water  line  of  the  boiler.  By  placing 
a  return  trap  on  the  boiler  room  floor  and  one  on  the  top  of  the  boiler  as 
indicated,  connecting  them  up  to  the  boiler  pressure  and  to  the  McAlear 
Air  Pump,  the  water  of  condensation  is  pulled  back  to  the  lower  trap  by 
means  of  the  vacuum  produced  by  the  pump  and  when  the  float  operates 
tlie  valve  mechanism  and  opens  the  valve  in  the  equalizing  connection,  the 
boiler  pressure  forces  the  water  from  the  lower  trap  up  into  the  one  on  top 
of  the  boiler.  When  this  trap  operates,  it  discharges  water  directly  into 
the  boiler  by  equalizing  the  steam  pressure  on  the  trap. 

The  entire  system  as  arranged  is  absolutely  reliable  and  efficient  in 
every  way. 

The  McAlear  Pump  produces  a  vacuum  on  both  traps  and  pulls  the 
water  of  condensation  and  air  from  the  heating  system  back  to  the  traps 
discharging  the  air  to  the  atmosphere  and  the  water  into  the  boiler.  You 
will  also  note  that  the  pump  discharges  into  the  lower  trap,  if  you  should 
desire  to  save  the  water  of  condensation  from  the  pump.  By  saving  this 
water  and  discharging  it  back  into  the  boiler  there  will  be  no  cost  in  the 
operation  of  the  pump  except  the  loss  of  a  few  heat  units  which  would  be 
the  difference  between  the  temperature  of  the  steam  entering  the  pump  and 
the  temperature  of  the  water  discharged  from  the  pump. 

A  Duplex  Water  P'eeder  is  provided  for  the  boiler  and  connected  up 
as  indicated  so  that  in  case  makeup  water  is  required,  it  will  be  automatically 
taken  care  of  by  the  boiler  feeder  and  if  for  any  reason  you  get  too  much 
water  into  the  boiler,  it  will  automatically  discharge  same  to  the  sewer. 

To  make  sure  that  there  will  always  be  sufficient  pressure  on  the  boiler 
to  operate  the  McAlear  Return  Traps,  we  would  advise  the  placing  of  a 
pressure  retaining  valve  in  the  supply  to  the  heating  system  so  that  when 
the  pressure  drops  below  the  point  at  which  the  return  traps  will  operate 
the  pressure  retaining  valve  will  close  off  automatically  and  prevent  steam 
from  escaping  from  the  boiler  into  the  heating  system,  thereby  preventing 
the  possibility  of  draining  the  boiler  of  water  and  the  flooding  of  the  traps 
with  the  water  of  condensation  from  the  heating  system. 


43 


VACUUM  6"  * ZXLEKRi*  heat 


VENT  PIPS 


AIR 


DIRT 


POCKET 

RETURN 


HEADER 


AIR 


VENT  PIPE 


DIRT  POCKET 


RETURN 


HEADER 


AIR 


VALVE 


SUPPLY 


HEADER 

AIR 


VALVE 


AIR  LINE 


Drawings  showing  method  of  making  return  line  vacuum  lieating  system  con¬ 
nections  to  Vento  Radiation  and  Blast  Coils. 


44 


HEATl  NGh  ♦7V\C^LEAR* -specialties 


The  above  ap])lieati()n  drawing  show's  manner  of  installing  a  steam 
driven  vacuum  pumj)  in  connection  with  a  two  pipe  vacuum  system  of 
heating.  The  discharge  from  the  pum])  is  connected  with  the  air  separating 
tank  placed  at  some  distance  above  the  boiler  feed  ])um])  or  heater,  so  that 
the  water  of  condensation  will  gravitate  to  the  boiler  feed  pum])  or  feed 
water  heater.  The  air  exhausted  from  the  system  is  discharged  to  the  atmos¬ 
phere  through  the  small  vent  ])ipe  w'hich  is  run  directly  to  the  atmosphere. 

In  the  water  discharge  connection  from  air  separating  tank  there  should 
be  j)rovided  a  water  seal  in  the  manner  indicated  and  the  discharge  con¬ 
nected  to  a  feed  water  heater,  receiving  tank,  or  boiler  feed  pump  direct. 

There  should  always  be  ])laced  in  the  suction  of  a  vacuum  pumj), 
whether  steam  driven  or  otherwise,  a  suction  strainer  for  the  purpose  of 
collecting  any  dirt  or  sediment  that  might  be  carried  back  with  the  water 
of  condensation  which  would,  if  not  collected  in  a  strainer,  interfere  with 
the  operation  of  the  pump  and  cause  the  cylinder  and  valves  to  cut  and 
wear  to  a  much  greater  degree  than  if  the  |)ump  had  nothing  but  clear 
water  to  handle  which  would  be  the  case  if  a  strainer  is  installed  as  above 
indicated. 

A  steam  driven  vacuum  pum])  should  be  equi])])cd  with  a  pum])  governor 
that  would  control  the  s])eed  of  the  ])um])  and  maintain  a  constant  vacuum 
on  the  ])i])e  lines  at  all  times.  If  a  governor  is  used,  the  lubricator  should 
be  placed  in  the  steam  su])])ly  above  the  governor  so  that  the  oil  on  its 
way  to  the  ))ump  cylinder  would  kee])  the  governor  well  lubricated. 

If  all  connections  are  niade  about  as  indicated  on  draw'ing,  there  will 
be  no  question  as  to  the  ])ro])er  working  of  the  a])])aratus  and  the  results 
obtained. 

For  Vacuum  Pum])  Governors  and  Suction  Strainers,  see  pages  58 
and  59. 


45 


VACUUM  6^  ♦ 


McAlear  Prefection  Radiator  Trap 


Actual  Size 
No.  28 


No.  28,  illustrated  in  section  on  the  opposite  page,  is  used  in  con¬ 
nection  with  Two  Pipe  Vacuum  or  Vapor  Heating  Systems.  The  construc¬ 
tion  is  such  that  when  the  radiators  are  operated  under  a  vacuum,  the 
valves  will  close  and  prevent  short  circuiting  and  heating  of  radiators 
through  return  connections.  They  perform  a  three-fold  duty — permit  the 
escape  of  water  and  air  in  large  quantities — hut  will  close  absolutely  tight 
against  steam — and  when  the  radiator  is  shut  down,  they  act  as  a  check 
valve  and  prevent  steam,  air  and  water  from  gaining  admission  to  the  radi¬ 
ator  when  same  is  not  in  service — all  of  which  is  very  necessary  in  Modu¬ 
lating  or  Vapor  Heating  Systems. 

McAlear  Perfection  Radiator  Traps  are  non-ad justable,  self  cleaning, 
absolutely  automatic,  noiseless  and  “fool”  proof.  Jet  water  in  the  suction 
of  the  Vacuum  Pump  is  not  required  if  McAlear  Perfection  Radiator  Traps 
are  used. 

Another  advantage — these  traps  can  be  used  right  or  left  hand  corner 
by  simply  turning  the  outlet  on  an  angle  of  45  degrees,  or  directly  on  the 
side,  if  desired.  We  advise,  however,  that  the  valve  outlet  be  placed  on 
an  angle  of  45  degrees  because  in  that  position  the  valve  will  drain  properly 
when  the  plant  is  shut  down. 

For  Application,  see  pages  37,  38  and  40. 

For  Ordering,  see  page  47. 

For  Prices  and  Dimensions,  see  page  47. 


46 


H  EAT  1  N  G-  3PEC1ALT1  E5 


McAlear  Perfection  Radiator  Trap 


Actual  Size 
No.  28 


Size,  Face  to  Face  and  over-all  Dimensions  of  Perfection 

Radiator  Traps 


No. 

Pipe 

Connections 

Face  of  Outlet 
to  Center  of 
Inlet 

Face  of  Inlet 
to  Center  of 
Outlet 

Diameter  of 
Valve  Body 

28 

2% 

Capacity  and  Price  of  Perfection  Radiator  Traps,  Nos.  28-30-32 


Nos. 

Capacity  in  Sq.  Ft. 
of  Direct 
Radiation 

PRICE 

All  Brass 
Nickel  Plated 

PRICE 

All  Brass 
Plain 

PRICE 
Iron  Body 
With  Brass 
Cap 
Plain 

28-30-32 

300 

$7.00 

$6.00 

$6.00 

I.iberal  discounts  from 

the  above  prices 

will  be  given  on 

application. 

The  above  eapacity  rating  is  based  on  square  feet  of  direet  radiation, 
with  radiators  operating  in  normal  temperatures  eondensing  3/10  of  a 
pound  steam  per  square  foot  per  hour. 

The  McAlear  Perfection  Radiator  Traps  will  close  tight  against  a 
steam  pressure  of  50  lbs.  when  discharging  direct  to  the  atmosphere  or  into 
a  vacuum  of  from  1  inch  to  25  inches. 


47 


VACUUM  &•  VAPOR  HEAT 


McAlear  Perfection  Radiator  Trap 


Three  Different  Forms  from 
which  to  Make  Your  Selection 


The  McAlear  Perfection  Radiator  Traps  are  made  in  three  different 
forms.  Our  standard  trap  is  figure  No.  28,  illustrated  on  pages  1-6  and  17. 
This  trap  differs  from  figure  No.  30  and  32  in  that  the  expansion  disc  and 
closing  disc  is  ])laced  vertically  on  the  discharge  side  of  the  valve  while 
in  figures  No.  30  and  32  the  expansion  disc  and  closing  disc  are  placed 
horizontally  on  the  inlet  side  of  the  valve.  Figure  No.  32,  however,  differs 
from  No.  30  in  that  we  liave  provided  a  sealed  adjustment  whereby  the 
valve  can  be  adjusted  on  the  job  to  meet  local  conditions.  Thus  you  will 
see  that  we  are  in  position  to  supply  your  requirements  with  any  form 
of  valve  you  desire. 

Our  figure  No.  28  traps  can  be  used  as  either  right  or  left  hand  corner 
and  figures  No.  30  and  32  as  right  and  left  hand  corner  by  turning  the 
outlet  on  the  side.  We  would  prefer,  however,  that  you  use  figure  No.  28 
as  an  angle  valve  or  as  a  right  and  left  hand  corner  with  the  discharge 
outlet  at  an  angle  of  forty-five  degrees  and  figures  No.  30  and  32  as  an 
angle  valve.  If  the  right  and  left  hand  corner  is  desired,  a  street  ell  can 
be  provided  for  the  outlet. 

h’igure  No.  28  Perfection  Radiator  Traps  are  also  made  without  union 
connection.  That  is,  tlie  })art  that  connects  with  the  Radiator  is  tapped 
with  a  left  hand  pipe  thread  and  in  connecting  the  valve  to  a  radiator,  a 
right  and  left  nipple  is  used.  Prices  on  valves  made  up  in  this  form  are  the 
same  as  on  our  figure  No.  28. 


48 


H  EAT  I  N  O'  jSPECIALTl  ES 


The  McAlear  Perfecton  Radiator  Top 


The  above  illustration  shows  a  sectional  view  of  the  INIcAlear  Perfection  Radi¬ 
ator  Trap  with  the  Thermostatic  disc  placed  horizontally  on  the  inlet  side.  This 
valve,  if  you  will  note,  is  provided  with  a  s])ring  underneath  the  closing  disc  to  keep 
the  valve  open  when  cold  or  when  not  in  service.  If  you  will  note,  this  valve  is 
non-ad justable  and  can  be  used  in  almost  any  form  you  wish  to  place  it  in. 

For  i)rices,  see  page  47. 


Inlet 


Actual  Size  No.  32 


Figure  No.  32  is  similar  in  construction  to  figure  No.  30,  the  only  difference 
being  tliat  it  is  ])rovided  with  an  adjustment  which  makes  it  possible  for  the  con¬ 
tractor  to  adJiLSt  the  valve  to  meet  local  conditions  on  the  job,  all  of  whicli  can 
l)e  very  readily  done  by  removing  the  hex  cap  on  top  of  adjiistment  screw. 

For  j)rices  and  diniensions,  figure  No.  30  and  32,  see  juige  47. 


49 


VACUUM  6-  heat 


McAlear  Perfection  Radiator  Trap 


No.  34 


Inlet 


The  traps  are  non- 
ad  justable  and  abso¬ 
lutely  automatic  and 
reliable  in  every  way. 

For  prices  and  di¬ 
mensions^  see  page  51. 

In  ordering,  please 
state  the  service  and 
pressures. 


The  above  cut  illustrates  the  exterior  of  our  McAlear  Perfection  Radi¬ 
ator  Trap  and  the  cut  on  page  51,  the  interior.  This  trap  is  used  to  drain 
large  coil  surfaces  such  as  blast  coil  worn,  dry  kiln  work,  wall  coils,  heating 
mains,  etc. 

The  traps  are  constructed  with  their  bodies  of  the  best  quality  of 
gray  cast  iron  with  discs  and  seats  of  a  good  quality  of  phosphorous  bronze. 
The  caps  are  constructed  of  brass  which  makes  them  very  easy  to  remove 
when  it  becomes  necessary  to  do  so. 

The  traps  will  close  absolutely  tight  against  twenty-five  pounds  steam 
pressure  when  in  service.  We  manufacture  them  to  close  against  higher 
pressures,  up  to  and  including  100  pounds,  if  desired.  In  ordering,  please 
state  the  pressure  that  traps  must  close  against  and  also  state  whether  they 
discharge  against  a  pressure  or  into  a  vacuum. 

These  traps  are  made  in  angle  pattern  only  and  when  used  must 
be  placed  as  shown  in  cut  with  the  disc  standing  vertically  on  the  discharge 
side. 


50 


! 


HEATINGr- 


♦  // 


!♦  SPECIALTIES 


McAlear  Perfection  Radiator  Trap 


Inlet 


No.  34. 

Pipe  connections 

Face  of  outlet  to  cen¬ 
ter  of  inlet  2^. 

Face  of  inlet  to  center 
of  outlet,  l^-g. 

Diameter  of  Valve  Body, 
334. 


No.  34 


Capacity  and  Prices  of  Perfection  Radiator  Traps 


No. 

Capacity  in  Sq.  Ft. 
of  Direct 
Radiation 

PRICE 

All  Brass 
Nickel  Plated 

PRICE 

All  Brass 
Plain 

PRICE 
Iron  Body 
With  Brass 
Cap 

Plain 

34 

1,500 

$16.00 

$14.00 

$12.00 

Liberal  discount  will  be  given  on  application. 

The  above  capacity  rating  is  based  on  square  feet  of  direct  radiation, 
with  radiators  operating  in  normal  temperatures  condensing  3/ 10  of  a 
pound  of  steam  per  square  foot  per  hour. 

The  McAlear  Perfection  Radiator  Traps  will  close  tight  against  a 
steam  pressure  of  50  lbs.  when  discharging  direct  to  the  atmosphere  or  into 
a  vacuum  of  from  1  inch  to  25  inches.  We  manufacture  traps  to  operate 
on  higher  pressures  if  desired.  In  ordering,  please  state  the  service  and 
pressures. 


61 


VACUUM  &  ♦MfHXERRi*  VAPOR  heat 


McAlear  Perfection  Trap 


Inlet 


No.  36 


Tlie  above  illustration  shows  the  McAlear  One  Inch  Perfection  Radi¬ 
ator  Trap  which  is  constructed  similar  to  the  Ya  biclp  figure  No.  31,  page  51. 
These  traps  are  especially  designed  for  use  in  connection  with  heating  sys¬ 
tems  where  a  large  quantity  of  water  must  be  handled  in  the  quickest  pos¬ 
sible  time.  They  are  simple  in  construction  and  absolutely  positive  and 
reliable  in  operation. 

The  discs  and  seats  are  made  of  the  same  high  grade  material  as  our 
3/14  inch,  figure  No.  34.  The  caps  and  bodies  are  also  made  of  the  same 
material. 

These  traps  will,  when  used  in  connection  with  vacuum  or  low  pressure 
heating  systems,  close  off  absolutley  tight  against  25  pounds  steam  pressure. 
We  manufacture  these  traps  to  operate  on  higher  pressures  up  to  and  in¬ 
cluding  100  pounds. 

In  ordering  traps,  please  state  the  service,  whether  for  use  in  con¬ 
nection  with  low  pressure  heating  or  vacuum  work  or  for  use  in  connection 
with  high  pressure  traps,  etc.  Always  state  the  pressures  that  trap  must 
close  against. 


52 


HEATING- 


McAlear  Perfection  Radiator  Trap 


Capacity  and  Prices  of  Perfection  Radiator  Traps 


Capacity  in  Sq. 

PRICE 

PRICE 

PRICE 

Iron  Body 
With  Brass  Cap 
Plain 

No. 

Ft.  of  Direct 

All  Brass 

All  Brass 

Radiation 

Nickel  Plated 

Plain 

36 

^,000 

$25.00 

$22.00 

$18.00 

Liberal  discounts  will  be  given  on  application. 

The  above  capacity  rating  is  based  on  square  feet  of  direct  radiation, 
with  radiators  operating  in  normal  temperatures  condensing  3/10  of  a 
pound  of  steam  p^r  square  foot  per  hour. 

The  McAlear  Perfection  Radiator  Traps  will  close  tight  against  a 
steam  pressure  of  50  lbs.  when  discharging  direct  to  the  atmosphere  or 
into  a  vacuum  of  from  1  inch  to  25  inches.  We  manufacture  traps  to  oper¬ 
ate  on  higher  pressures  if  desired. 

In  ordering,  please  state  the  service  and  pressures. 


53 


VACUUM  6"  ♦  Ml VAPOR  HEAT 


McAlear  Packless  Graduating  Valve 


Inlet 


Improvement  Over  All  Other  Styles 

The  McAlear  Packless  Graduating  Valve  has  advantages  over  all  other 
styles  and  makes — it  embodies  all  the  scientific  principles  necessary  in 
manufacturing  a  successful  operating  valve  of  this  character — it  is  the  last 
word  in  graduating  and  modulating. 

Here  you  have  a  valve  constructed  of  the  best  steam  metals,  with  spe¬ 
cial  composition  discs.  The  Packless  Discs  are  of  exactly  the  same  con¬ 
struction  as  used  in  other  valves  of  the  same  type  of  which  there  are 
over  a  million  in  use  with  a  record  of  not  even  one  ever  having  been 
changed. 

The  castings  are  highly  finished — the  handles  are  made  of  mahogany, 
strongly  reinforced  so  that  they  cannot  chip  or  crack — the  valves  are  all 
heavily  nickel  plated,  guaranteed  to  retain  a  bright  and  handsome  appear¬ 
ance. 

The  McAlear  is  not  only  the  handsomest  graduating  valve,  but  it  is 
the  simplest  and  best  construction  of  any  packless  valve  in  existence.  To 
obtain  the  highest  degree  of  efficiency,  adopt  the  McAlear  Valve  as  the 
method  of  inserting  various  size  discs  for  various  size  radiators.  The 
adjustments  on  top  of  valve  to  regulate  the  valve  travel  are  in  themselves 
advantages  worth  your  most  serious  consideration. 


54 


HEATING-  SPECIALTIES 


McAlear  Packless  Graduating  Valve 


Prices  and  Dimensions 


SIZE 


Rough  Body,  plated  all  over . |  •$4.15 


34 


1^4 


11/ 


.$4.80 


$5.75 


$7.40  I  $9.10 


Face  of  outlet  to  center  of  inlet. 


11/4" 


1t^" 


11/ 


m" 


3" 


2/2" 

27/" 

3/" 

31/" 

Face  of  inlet  to  center  of  outlet. 


37/8" 


Liberal  discounts  will  be  given  to  the  trade. 
Made  in  Angle  Pattern  only. 

Various  Size  Discs  for  Graduated  Valves 


Size  of  Valve, 

Xo.  of  Discs . 

Sq.  Ft.  of  Direct  Radiation . 

No.  1 

1'  to  20' 

No.  2 
20'  to  35' 

No.  3 
35'  to  50' 

No.  4 
50' to  65' 

No.  5 

65'  to  80' 

Size  of  Valve, 

Xo.  of  Discs . 

Sq.  Ft.  of  Direct  Radiation . 

No.  6 

P  to  25' 

No.  7 
25'  to  50' 

No.  8 
50'  to  75' 

No.  9 

75'  to  100' 

No.  10 
100'tol25' 

Size  of  Valve,  1" 

No.  of  Discs . 

Sq.  Ft.  of  Direct  Radiation . 

No.  11 
25'  to  50' 

No.  12 
50'  to  75' 

No.  13 
75' to  100' 

No.  14 
100'tol50' 

No.  15 
150'to200' 

Size  of  Valve,  1/" 

No.  of  Discs . 

Sq.  Ft.  of  Direct  Radiation . 

No.  16 
75'  to  100' 

No.  17 
100'tol25' 

No.  18 
125'tol50' 

No.  19 
150'tol75' 

No.  20 
175'to200' 

Size  of  Valve,  1/" 

Xo.  of  Discs . 

Sq.  Ft.  of  Direct  Radiation . 

No.  21 
100'tol25' 

No.  22 
125'tol50' 

No.  23 
150'tol75' 

No.  24 
175'to200' 

No.  25 
200'to250' 

Prices  given  on  application. 

In  ordering  valves  please  state  the  size  and  number  of  disc  required. 


65 


VACUUM  heat 

Kieley  Special  Low  Pressure  Vapor  Regulating  Valve 


No.  44 


Prices  and  Weights 


Size  . . . . 

Ixi2 

1  114^2^  1 

1^x3 

2x4 

1 

1  3x6 

Price  . 

.$33.00 

1  $42.50 

.$53.50 

1  .$72.00 

1  .$96.00 

1  $126.00 

Weight . 

90 

1  95 

98 

1  100 

1  115 

1  125 

Size  . 1 

4x() 

4x8  1 

5x10 

6x12 

1  8x14 

1  8x16 

Price  . . . 

.$140.00 

1  $187.50 

,$242.00 

1  $325.00 

1  $400.00 

1  .$500.00 

Weight . . 

1(50 

1(55 

185 

1  235 

1  335 

1  370 

Valves  are  made  in  straight  and  differential  sizes. 

Size  1  X  2"  made  with  screwed  ends  only.  Sixes  1)4  x  2^"  up  to 
2  X  4"  are  made  with  small  ends  screwed  and  large  ends  flanged.  All 
other  sizes  above  2  x  4"  have  both  ends  flanged. 

M  aximnm  reduced  pressure  must  not  exceed  three  pounds. 

Ordering — It  is  very  important  that  the  following  information  be 
given : 

First:  Initial  or  High  Pressure. 

Second:  Reduced  or  Delivery  Pressure. 

Third:  Service  for  which  the  reduced  pressure  is  used. 

Fourth:  State  if  companion  flanges  and  bolts  are  required. 

Flanges — All  flanged  valves  are  drilled  as  per  standard.  Com})anion 
flanges  and  bolts  are  extra  and  furnished  only  when  so  ordered. 


56 


HEATING-  ♦7Y\9,/\LE^R*<SPECIALT1E3 


There  has  been  a  growing  demand  for  a  special  low  pressure  vapor 
rcgidating  valve  that  would  control  steam  pressures  in  ounces  in  place  of 
pounds.  This  type  of  valve  is  illustrated  on  page  56  and  is  especially  de¬ 
signed  for  use  in  connection  with  vacuum  vapor  and  modulation  systems  of 
heating.  Its  design  and  construction  makes  it  possible  to  control  any 
reduced  pressure  with  practically  no  variation  from  the  point  at  which  it 
is  set. 

These  regulating  valves  are  made  in  either  straight  or  differential  pat¬ 
tern  suitable  for  any  initial  pressure  up  to  125  pounds  and  a  maximum 
reduced  pressure  of  three  pounds  to  atmosphere  or  below. 

These  valves  are  constructed  of  good  quality  grey  cast  iron  with  seats 
and  discs  of  the  best  government  metal.  To  adjust  the  valve  to  maintain 
any  given  reduced  pressure,  move  the  weight  in  or  out  on  lever  until  the 
valve  establishes  the  pressure  you  desire.  If  close  regulation  is  desired,  we 
would  recommend  that  two  weights  be  used  as  better  regulation  can  be 
had  and  maintained  by  using  two  weights  than  is  possible  to  get  with  one. 


Application  of  the  Kieley  Special  Low  Pressure 
Vapor  Regulating  Valve 

In  making  the  diaphragm  connection,  be  sure  to  use  a  T  in  the  main 
line  as  indicated  in  order  to  insure  a  proper  water  seal  for  the  protection  of 
the  diaphragm. 

Do  not  tap  the  pipe  for  this  connection  as  it  is  almost  impossible  to 
screw  a  pipe  into  another  one  without  having  the  pipe  projeet  some  distance 
into  the  other  which  would  tend  to  prevent  the  water  of  condensation  that 
would  take  place  in  the  main  from  getting  into  the  small  pipe  leading  to 
the  diaphragm.  Therefore,  we  recommend  that  a  T  be  placed  in  the  line 
for  the  diaphragm  connection  as  indicated. 


57 


VACUUM  6-  VAPOR  HEAT 


» 

Kieley  Vacuum  Pump  Regulators 


No.  46  No.  46  Screwed  End  Angle.  No  .48 


Size  . 

. 1  Vi 

1  3/4 

1  1 

1^/4 

114 

2 

2 

1  314 

3 

Weight  . .  . . 

. 1  39 

1  41 

42 

43  1 

44 

45 

55 

1  6’0 

70 

Price  . 

.  . .  . .  $30.00 

$30.00 

$35.00 

$40.00 

$45.00 

$50.00 

$50.00  |$60.00 

$75.00 

No.  48  Screwed  End  Globe. 

Size  . 

. 1  V2 

1  3/4 

1  1 

114 

1/2 

2 

2 

1  2^ 

3 

Weight  .... 

. 1  39 

1  41 

42 

43  1 

44 

45 

55 

1  60 

70 

Price  . 

. 1  $30.00  |$30.00 

$35.00 

$40.00 

$45.00 

$50.00  |$50.00  |$60.00 

$75.00 

All  sizes  up  to  2"  inclusive  have  screw  ends ;  2"  and  larger  can  be 
furnished  with  flanged  ends.  Dimensions  and  weights  on  application. 

Ordering — It  is  very  important  that  the  following  information  be 
given : 

First:  Initial  Steam  Pressure. 

Second:  The  number  of  inches  of  vacuum  you  wish  to  maintain  on 
pump  suction. 

Third:  State  if  pump  is  used  in  connection  with  a  vacuum  return 
line  heating  system  or  other  service. 

Fourth:  State  if  globe  or  angle  pattern  is  required. 

Service — For  controlling  the  speed  of  vacuum  pumps  and  the  amount 
of  vacuum  carried  on  the  pump  suction. 

Regulation — Will  absolutely  control  the  speed  and  maintain  a  uniform 
vacuum  on  the  pump  suction  at  all  times^  the  variations  between  the  high 
and  low  vacuum  being  less  than  1". 

Its  simplicity  of  construction  enables  quick  adjustment  of  moving 
parts. 

Working  Pressure — Suitable  for  150  lbs.  steam  pressure  or  less. 

Regulation :  Compress  spring  to  increase  vacuum^  and  relax  to  decrease. 

Governor  can  be  arranged  to  give  a  gradual  or  a  quick  closing  effect 
at  an  additional  cost.  This  applies  to  both  globe  and  angle  patterns. 

Construction — They  are  made  in  angle  and  globe  pattern.  Sizes  up  to 
2"  inclusive  have  Government  Bronze  bodies,  seats  and  discs,  with  screwed 
ends;  size  2"  and  larger  have  iron  bodies  with  Government  Bronze  seats 
and  discs,  with  either  screwed  or  flanged  ends. 


58 


HEATINGh  ♦ 


MSiSlEAM*  ^PECIALTI  E5 


Kieley  Suction  Stainer 


Prices  and  Weights 


Size  . 

....|  2 

3/2 

3 

314 

4  1 

4/2 

5 

6 

Weight  .... 

. . . .  1  35 

55  1 

60 

90 

95 

135 

140 

150 

Price  . 

o 

o 

$18.00 

$22.00 

$26.00 

$30.00 

0 

0 

*0 

0 

0 

d 

$75.00 

Prices  on  larger  sizes  furnished  on  application. 


Adapted  for  Any  and  All  Services. 

The  Kieley  Suction  Strainers  are  suitable  for  any  and  all  serviees. 
They  are  especially  adapted  for  use  in  connection  with  vacuum  heating- 
systems,  vacuum  pumps,  boiler  feed  pumps,  house  pumps,  fire  pumps,  water 
works  pumps  and  oil  pumps. 

No  pumiD  should  be  installed  without  a  Kieley  Strainer,  as  it  is  the 
best  possible  protection  against  dirt  or  sediment  lodging  in  the  suction 
valves  and  cylinders  whieh  at  times  causes  the  pumps  to  lose  their  priming 
and  may  possibly  eause  some  of  the  movable  parts  to  break  from  the  pound¬ 
ing  and  jarring  so  frequently  experienced  in  pumps  running  at  high  speed 
without  water. 

The  strainers  also  prevent  grit,  sand  and  other  foreign  matter,  so 
often  found  in  water,  from  getting  into  the  valves  and  moving  parts. 

The  Kieley  Strainers  are  provided  with  a  movable,  flanged  cap  on 
top  so  that  the  strainer  basket  can.  easily  be  removed  for  cleaning  without 
disturbing  any  of  the  pipe  connections.  The  strainer  basket  is  constructed 
of  heavy  sheet  copper  with  brass  handle.  The  basket  has  sufficient  free 
area  to  avoid  any  possible  restrietion  to  the  flow  of  water  through  it.  These 
strainers  must  not  be  used  where  the  pressure  is  over  seventy-five  pounds. 

CONSTRUCTION — Made  in  flanged  end  pattern  only  with  cast  iron 
bodies. 

The  illustration  on  page  45  shows  the  proper  method  of  using  and 
installing  the  Kieley  Suction  Strainer.  These  strainers  are  very  effeetive 
when  used  in  eonneetion  with  our  Water  Jet  Controllers. 


59 


VACUUM  CsT 


♦  VAPOR  HEAT 


McAlear  Air  Exhauster  and  Return  Trap 


No.  52 


SERVICE — The  McAlear  Air  Exhairster  and  Return  Trap  is  used  for  the  purpose 
of  handling  water  of  condensation  from  heating  systems,  drip  tanks,  drains,  etc., 
raising  it  from  a  lower  level  to  a  higher  one,  discharging  it  into  boilers,  receiving 
tanks,  feed  water  heaters  or  the  sewer  direct. 

These  traps  will  automatically  discharge  water  against  any  head  so  long  as  the 
pressure  on  the  live  steam  inlet  to  the  trap  equals  one  pound  pressure  to  every 
18"  lift  on  the  discharge. 

These  traps  are  absolutely  automatic  and  positive  in  operation,  and  will  when 
properly  installed,  handle  either  hot  or  cold  water  in  large  quantities. 

A  and  C — Inlet. 

B — Discharge. 

D — Steam  Inlet. 

For  application  drawing,  see  pages  38-40-42. 


Prices,  Dimensions,  Weights  and  Capacities 
No.  750— Kieley  Pump  or  Lift  Trap 


Number  of  trap . 

1  1 

1  2 

3 

1  4 

5 

6 

1  1 

1  3 

A — Inlet  and  outlet . 

1  % 

1  1 

114 

1  1 V2 

2 

21/2 

1  3 

1  4 

B  . 

1  16 

1  16 

16 

1  16 

16  . 

17 

1  20 

1  25 

C  . 

1  22 

1  22 

')  0 

1  22 

22 

23 

1  24 

1  27 

D  . 

1  241/2 

1  241/^ 

241/2 

1  241/2 

241/2 

27 

1  301/2 

1  3  81/4 

E  . 

1  30 

i  30 

30 

1  30 

30 

311/2 

1  34 

1  391/2 

F — Steam  . 

1  % 

1  % 

% 

1  % 

% 

% 

1  % 

1  % 

G — Exhaust  . 

1  % 

1  % 

% 

1  % 

% 

% 

1  % 

1  % 

Cap.,  lbs.  wat.  per  hr.  .  . 

1  480 

600 

1.000 

1  2,000 

3,000 

4,000 

1  7,500 

1  10,500 

Cap.,  sq.  ft.  of  radiation 

1  1,600 

1  2,000 

3,400 

1  6,400 

10,000 

13,400 

125,000 

1  35,000 

Cap.,  lin.  ft.  1"  pipe.... 

1  5,000 

1  6,000 

10.000 

|20,00(» 

3  0,000 

40,000 

175,000 

1110,000 

Weight  . 

1  225 

1  225 

225 

1  225 

225 

235 

1  325 

1  6(10 

Price  . 

|$90.00 

|$100.00i$150.00 

|$200.00 

$250.00|$300.00 

|$550.00 

|$650.00 

60 


HEATING-  -specialties 


Kieley  Pressure  Retaining  Valve 


No.  54 


Prices 


Size  . 

. 1  M 

1 

1  114 

1/4 

2 

3 

3/2 

Price  .... 

. 1  .1^27.50 

$30.00 

!  $35.00 

$42.50 

$50.00 

.$65.00 

.$82.50 

$95.00 

Size  . 

. 1  4  1 

5 

1  0  i  7 

8 

10 

12 

Price  .... 

. $11,5.00  j$150.00 

|$190.00  $240.00 

.$300.00 

.$;175.00  |, $500.00 

^lade  screwed  ends  up  to  4"  inclusive,  and  flanged  ends  2"  and  larger. 

Ordering — It  is  very  important  that  the  following  information  be  given: 

First:  Pressure  to  be  retained. 

Second :  State  Service. 

Third:  State  whether  regular  or  extra  heavy  pattern. 

Fourth:  State  if  companion  flanges  and  bolts  are  required. 

P'langes — Companion  flanges  and  bolts  are  always  extra  and  furnished 
only  with  valves  when  so  ordered. 

Service — The  Kieley  Pressure  Retaining  Valve  is  used  principally  in 
connection  with  low  pressure  heating  boilers  for  retaining  the  required 
ainoimt  of  boiler  ])ressure  for  operating  boiler  feed  pumps,  return  traps, 
etc.,  used  for  returning  the  water  of  condensation  from  the  heating  system 
back  to  the  boilers.  If  for  any  reason  the  boiler  pressure  drops  below  the 
point  at  which  the  feed  pumps  or  return  traps  will  operate,  the  valve  will 
close  automatically  and  prevent  the  escape  of  steam  from  the  boiler  into 
the  heating  system,  and  by  so  doing,  eliminates  any  possibility  of  burning 
the  boiler  or  flooding  the  heating  system  with  water  of  condensation. 

Regulation — To  increase  the  boiler  pressure  compress  spring,  and  to 
decrease  it  relax  sj^ring. 

Working  Pressure — Standard  Weight:  125  lbs.  Extra  Heavy:  150  lbs. 

\hilves  are  constructed  of  cast  iron  witli  Composition  working  parts. 

For  application  drawing,  see  page  42. 


61 


VACUUM  vapor  heat 


McAlear  Vapor  Regulator 

For  Controlling  Dampers  and  Check  Drafts  on  Vapor 


The  McAlear  Vapor  Regulator  is  very  sensitive  and  unusually  power¬ 
ful — it  will  control  boiler  pressures  in  ounces  from  “0”  to  one  pound. 
In  other  words,  you  can  maintain  any  pressure  in  ounces  you  desire  be¬ 
tween  nothing  and  one  pound  with  but  slight  variation  from  the  point  at 
whicli  the  regulator  is  set. 

The  size  of  the  bellows  is  12"  diameter,  with  four  flexible  walls  which 
gives  the  required  travel  of  Yz''  without  causing  any  strain  whatsoever  on 
any  of  its  parts.  This  travel  of  when  distributed  on  the  four  walls 
is  only  an  ex23ansion  of  — less  than  100%  of  what  each  wall  would 

actually  expand  with  safety. 

These  damioer  regulators  must  not  be  used  on  steam  pressures  above 
3  pounds,  nor  on  a  vacuum  of  over  five  inches. 

The  McAlear  Vapor  Regulator  No.  56  comes  with  a  1"  steam  con¬ 
nection,  shipped  complete  with  lever  and  two  weights,  together  with  the 
“S”  hooks,  two  ceiling  pulleys,  one  1"  nipple  and  12  feet  of  chain. 


Shipping  Weight,  35  Ihs.  Price  of  Regular  Complete,  $30.00 


McAlear  Steam 
Regulator  for 
Damper  Control 


No.  58 


This  regulator  is  composed  of  four  8"  discs  which  travel  in  actual 
service  about  — constructed  of  special  bronze  which  not  only  insures 

sensitiveness  and  durability,  but  absolute  reliability. 

It  will  operate  on  the  slightest  variation  in  pressures  and  by  simply 
moving  the  weights  on  the  lever  you  can  easily  control  and  maintain  any 
boiler  pressure  desired  between  minimum  and  maximum. 

The  McAlear  Steam  Regulator  No.  68  comes  with  a  1"  steam  connec¬ 
tion,  shipped  complete  with  lever  and  two  weights,  togetlier  with  the  nec¬ 
essary  “S”  hooks,  two  ceiling  pulleys,  one  1"  nipple  and  12  feet  of  chain. 

Shipping  Weight,  15  lbs.  Price  of  Regular  Complete,  $20.00 


62 


H  EAT  1  N  G-  «7V\'9,^LEAR->  3PECIALT1E5 


The  Kieley  Air  Trap 


Outlet 


Inlet  No.  60 


SERVICE — The  Air  Trap  above  illustrated  is  suitable  for  services  in  connection 
with  steam  or  hot  water  heating  systems  for  relieving  the  mains  and  radiators  of 
air  automatically. 

The  seats  and  discs  are  constructed  of  a  good  quality  of  bronze  and  when  in 
service  will  close  absolutely  tight  against  the  water  pressure  and  open  automatically 
to  relieve  the  system  of  air,  but  under  no  circumstances  will  the  trap  discharge  water. 

These  traps  are  usually  placed  at  high  points  in  the  system  or  where  air  is  liable 
to  accumulate. 

This  trap  can  also  be  used  in  connection  with  water  works  systems  to  relieve  the 
mains  at  different  points  of  air.  If  you  will  note  we  build  these  air  traps  in  seven 
different  sizes,  which  makes  it  possible  for  us  to  take  care  of  any  amount  of  air  that 
may  accumulate  in  cold  water  mains  or  hot  water  heating  systems. 


Prices,  Dimensions,  Weights  and  Capacities 
High  and  Low  Pressure 


Number  of  Trap 

. i  0 

1 

1  2 

3 

4 

1  6 

1  6 

7 

A  . 

. 1  1/2 

% 

1  1 

11/4 

iy2 

1  2 

1  2y2 

3 

B  . 

. 1  8% 

9% 

10% 

12 

141/8 

1  151/8 

1  17  ys 

18  y2 

C  . 

. 1  21/8 

2% 

1  2% 

3% 

4% 

1  4% 

1  4% 

6y8 

D  . 

. 1  121/4 

14  Va 

1  161/8 

IS 

181/8 

1  201/2 

1  24 

25  ^ 

B  . 

. 1  31/2 

3% 

4 

3% 

3% 

1  4y8 

1  41/8 

4yo 

F  . 

5y2 

1  6% 

71/2 

8 

1  10% 

1  101/4 

10% 

Capacity,  sq.  ft, 

radiationi  900 

1,300 

1  2,000 

3,300 

5,000 

1  8,300 

111,500 

16.500 

Weight  . 

. 1  30 

40 

1  50 

55 

65 

1  105 

1  130 

145 

Price  . 

. 1  121 

$25 

1  $35 

$45 

$60 

1  $80 

1  $100 

$125 

ORDERING — In  ordering  air  traps  it  is  very  important  that  the  following 
information  be  given  on  all  orders: 

First:  Range  of  pressure  on  water  mains. 

Second:  Does  water  pressure  vary,  and  if  so,  to  what  extent? 

Third:  State  if  for  use  in  connection  with  steam  or  hot  water  heating  systems 
or  cold  water  supply  mains. 

Fourth:  State  approximately,  if  possible,  the  amount  of  air  in  cubic  feet  per 
minute  the  trap  must  discharge. 

Fifth:  State  if  for  use  in  connection  with  high  or  low  pressure  service. 

Sixth:  State  if  water  gauge  glass  equipment  is  wanted.  Water  gauges  are  extra 
and  are  only  furnished  when  so  ordered. 

For  application  see  page  64. 


63 


VACUUM  <y  heat 


Application  of  Air  Trap 


NOTE:  CONNECTION  HARKED  A 

TO  BE  CONNECTED  WITH  DREECHING, 
OR  RUN  TO  ATMOSPHERE  DIRECT 


SUPPORT 


Page 

o 


CONTENTS 

McAlear  System  . 

McAlear  Guarantee  of  Service .  3 

McAlear  Vacuum  Pumps . T,  5,  6,  7,  8 

Application  of  McAlear  Vacuum  Pumps .  9 

Oi)eration  and  Advantages  of  AIcAlear  Vacuum  Pumps  and  System . 

. 10,  11,  12,  13,  14,  13 


Application  of  McAlear  Vacuum  Pumps  and  Air  Line  System . 16,  17,  18,  19,  20 

McAlear  Vacuum  Pumps — Prices,  Capacities,  Weights  and  Overall  Dimensions.  ..  .21 

McAlear  Electric  Air  Line  Vacuum  Pumps . 22 

Prices,  Capacities,  Weights  and  Dimensions  of  McAlear  Electric  Air  Line  Pumps.. 23 

.Application  of  McAlear  Electric  Air  Line  Pumps . 24 

Fourteen  Reasons  Why  AMu  Should  Adopt  the  AIcAlear  Air  Line  System . 23 

.McAlear  Thermo  A"ent  Automatic  Air  A'alve — Cuts,  Description  and  Prices 

. 26,  27,  28,  29,  30,  31 

Application  of  McAlear  Air  Line  System  of  A'acuum  Heating  Used  in  Connection 

with  High  Pressure  Boilers . 32 

Specifications  of  McAlear  Air  Line  Vacuum  System  of  Heating . 33,  34,  33 

Sparks  Vacuum  Piunps . 36 

.A Implication  Drawings  of  2  Pipe  A'acuum  and  A^apor  Systems . 

. . 37,  38,  39,  40,  41,  42,  43,  44,  43 

Alc.Alear  Perfection  Radiator  Traps — Prices,  Capacities  and  Dimensions . 

. 46,  47,  48,  49,  30,  31,  32,  33 

.Mc.Alear  Packless  Graduated  Radiator  A'alve — Prices,  Capacities  and  Dimensions 
. 34,  33 


Special  Low  Pressure  ATapor  Regulator  AMlves — Prices  and  Application . 36,  37 

Steam  A'acuum  Pump  Regulators . 38 

Suction  Strainer  . '^9 

McAlear  Air  Exhauster  and  Return  Tra])s . 60 

Pressure  Retaining  A'alve . hi 

Damper  Regulators  . h2 

Air  Trap  . h3 


64 


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